When one sends another man to a girl's house for some birthday sex and a viewing of Flintstones in Viva Rock Vegas, and when the guy gets there, the girl is sleeping and doesn't know why he's there.
Pat: Hey Alec, did you get together with Sydney last night for some birthday sex?
Alec: Nah man, I got the Flintstones Treatment...
Alec: Nah man, I got the Flintstones Treatment...
by Themanof July 8, 2017
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