I work as a cashier in a large store selling plants, gardening equipment etc. My working day is 10.30am - 6pm, with a short lunch break at midday and another short break at around 4pm. By this time, I'm usually in need of a ****, so I head across to the break room to relieve myself.
However, on this particular day, we were short-staffed, and there was only me and a female cashier on the tills. We both had steady queues of customers, so by the time 4pm came, neither of us could go for our break. This wasn't a big problem for me... although I had to pee, I could wait for a few more minutes until it got less busy.
By 4.30, I really had to go, and we still both had steady lines of people waiting to pay. I shifted uncomfortably in my chair, crossing my ankles. I asked the cashier next to me if she wanted a break, but she said she didn't need one and would carry on serving. As I squirmed in my chair, I thought back to when I last pissed - about 10am that morning. Since that time, I had drunk 2 cups of cheap coffee from the machine in the break room as well as about half my bottle of water I took to work. I bit my lip and served the next customer.
By 5pm, the store was as busy as ever, and I was incredibly desperate to ****. There was still nobody who would take over from me, and it was simply not possible for me to just close the till and rush off to the bathroom. I had no choice but to wait. My bursting bladder was getting fuller by the minute, and I was urgently jiggling my knees and fanning them in and out to help me wait. When I spoke to the customers, my answers were short and snappy - I didn't mean them to be, I was just too preoccupied by my urgent need to urinate. The female cashier asked if I was OK, and I replied that I was fine, just needed a break. I'm way too shy to ever admit to needing to pee. She said that somebody would be coming down to swap with me soon, and this made me feel slightly better.
By the time the relief cashier finally came at about 5.15, I was clenching my muscles and pressing my knees together so hard I was almost hovering above my chair. I was even squeezing my **** under the counter when I thought nobody would be looking. My bladder was giving urgent signals that I had to ****, and soon. I couldn't remember ever having to go this badly, even at school or in detention (see my 'Desperate Detention' story for details!). This was something else, my bladder was taking up so much of my attention I could barely concentrate on the sales and was making frequent errors. I turned around to the relief cashier and was about to ask her to swap with me, but found she'd gone to check a price for the cashier next to me. Just another delay in getting relief I could really have done without!
She finally came back, and I quickly finished the sale I was doing and swapped with her. My bladder was so full I could barely stand up straight. I walked as quickly as I could out of the store towards the break room, and the staff toilet. I was avoiding eye contact with the customers in the hope that none of them would stop and ask me a question, because I knew that if anyone did, it would be painfully obvious that I was absolutely desperate to ****, I was past the point of being able to hide my need. I was walking with my knees pressed together, my body bent forward ever so slightly. My bursting bladder felt heavy and cumbersome, bulging against my work uniform. Every step jolted it and made me grit my teeth in desperation.
Finally, I got to the break room. As I stopped to enter the code on the door keypad, I crossed my legs and grasped my **** hard with my other hand, bobbing up and down violently on the spot, not caring who saw me. Relief was so close now. I got the door open and hurried across to the toilet. Slamming the door behind me, I ripped open my fly. I glanced down at my bladder, feeling the bulge with my hand. It was absolutely rock hard. I aimed my **** down at the toilet and just let loose. My muscles were so tense it took a few seconds for the stream to get going, but when it finally did it was pure ecstasy. I pissed for about 5 minutes in total, stopping and starting as my tired muscles finally relaxed. Feeling much better, I headed back to the tills and the cashier next to me asked if I was feeling better. I asked what she meant, and she thought I'd had a headache or something, because I was acting so strangely. If only she knew ;)