an acronym standing for "No One Gives a Fuck". It comes from the common no life facebook post, in which any good samaritan should kindly relay the message that no one cares.
The comment is geared towards but not limited to; vague posts on how the night was, what they ate, some dumb philosophy on relationships, and the hot new person they are into. If a post looks like a plead for attention just post NOGAF
Girl on FB:Depressing night :(
Girl on FB: god this always happens to me:(
Good Samaritan: NO GAF