Definitions by techsupporte

sis fist 

the equivalent of a 'bro fist' but between two girls that are so close theyre like sisters, often done by girls who aren't prissy but rather 'hardcore, gangster, punk girls' etc.

'sup girly'
(insert sis fist)
'not much you?'

sis fist by techsupporte November 8, 2011