to me humble is being able to say you don't know something; and not boasting or showing off with good looks, great job, great money, house and kids. if someone is not humble; God will take it away what he knows or has. like they say "what God given; he will take away "
I think you have read that wrong.,He said whoever humbles himself will be exalted,whoever exalts himself will be humbled.God exalts the humble but he humbles the exalted ones.Just be humble and you will be fine.
swallow your pride, be able to admit when youre wrong