when an individual hears and does not know the meaning of a slang term, instead of asking what it means, he/she will act as if they know the meaning of the word and then later go home and look up the definition on urbandictionary.com so as not to look like a complete noob.
something all of you have done.
"some kid said he pwn3d me last night and i said 'yeah whateva' but i had to urb it later on"
person #1 "dude, that bitch dropped a boston steamer on me last night!"
person #2 "... that's awesome!"
person #1 "dubtif? go home and urb that ish n00b"