What is Your Best Friend's Sister?
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a stupid comeback phrase that's used for virtually everything, even if it doesn't make any sense whatsoever
Friend #1: dude! i saw your mom last night! she was hot!
Friend #2: your best friend's sister!
Friend #!: you have a sister!?
dude: what happened last night!?
dude 2: your best friend's sister!
dude: shut up!
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more mockney slang-
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Macintoshish for everything.
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Involving one guy and two girls or three guys, either way. Anyway, it is when a guy lays down naked and one of the three sits on his fac..