when you hi 5 a bi-sexual.

often used to imply the person you are hi 5ing is a closet bisexual.
hey sam nice bi five!

"Hey Joseph, did you just hi five Jake?"
"No way man, that was a definite bi 5!"
"Wait, so he's a ---"
"Yep, biggest bi on the block!"
by fine_dine_decca August 1, 2009
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