NGAF
When someone says something that seems very important to them and is useless or boring information to everyone else hence No one Gives a Fuck.
Dave: So I saw this guy on the train and he was selling chocolates for $1 and I bargained him down to .50c.
Sally: NGAF man.
Garth: Dude NGAF!
Sally: NGAF man.
Garth: Dude NGAF!
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