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
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 2: oh my god who the hell cares
by i like urbandictionary October 07, 2011
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