You and the French... snickering...
Maybe they left off the end -- potato knife. Perhaps, maybe, could be.
Hmm, perhaps you're not exactly on the same level of humour with the guy.<br />
I know, and so do a few other people around my age all know that to describe something as a potato is funny because its a random item which has become sort of a meme these days.
Wow, OK, definitely not a meme then XD But err, to describe things as a potato is quite common I find. Nice memory though o.O
:) too funny