1. noun ~ Short for Urban Dictionary.
2. adjective ~ someone who is addicted to Urban Dictionary.
~ can also be "urbdic", without fancy capital letters.
1. "Find that definition on UrbDic."
"How many definitions for "hipster" are on urbdic?!"
2. "I can't stop looking stuff up! I'm a complete UrbDic."
P.O.S. or POS ~ A more subtle way of calling someone a "piece of shit". A more succinct way to call someone a "piece of shit", even though it has just as many syllables.
"Wow, that customer was a P.O.S."
"Stop being such a POS!"