Top Definition
Used by Peter Griffin. A girl talks about her Malibu Stacy doll, according to Peter, but nobody cares about it.
I will be using: OMG instead of Oh my god in Oh my god who the hell cares, because of the way he said: Oh my god. It was like a teenage girl would on sweet sixteen or on the on the internet. Just imagine it.

"This is my Malibu Stacy doll, she comes with a comb and an extra dress !"a young girl exclaimed happily

To which peter replies, "OMG Who the hell cares ?"
by TakaD August 16, 2011
1 more definition
another phrase for "dude shut the hell up" or "I DONT GIVE"
Teacher: so when we mix these two liquids, they create a new colour and so that mixes up the colours..."
guy: OH MY GOD WHO THE HELL CARES, DUMBASS
guy 2: oh my god who the hell cares
by i like urbandictionary October 07, 2011

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