Top Definition
aka You Inconsiderate No Good Fucking Asshole. used for people who are oblivious to other's feelings, thoughts, or needs. that type of person you just wish would wake up and stop being such a dick.
girl #1: god, that guy over there just fucked me over... he didn't even show up for our group presentation. it was half of our damn grade!

girl #2: what a yingfa.
by truetrollop April 27, 2011

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