Top Definition
tnfc is a word i made up, for "totally not fucking cool."
it's kind of like omg, lol, or wtf.
it's not like paris hilton killed someone. that's tnfc.

guy: omagh hay betch, asl?
girl: fucking fgt. that's tnfc, gtfo and get a life.
by angie duh June 15, 2007
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