When two girl best friends act more like sisters then as friends. Similar personalities and think alike.
God made us best friends because he knows no mother could handle us as sisters. Sisterism
by k&jsisters December 10, 2010
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When a dude tucks his junk between his thighs to make it look like he has a vagina.

(Equally funny whether shaven or unshaven)
Remember the time Grover got really wasted and came out of the bathroom buck-naked doing The Sister?!!
by Krebsy's Sister March 04, 2017
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The term utilized (including quotes) to refer to a lesbian's significant other when said lesbian is seeking to keep their gay sexual orientation unknown.
Elizabeth says she is bringing her "sister" on the company trip. No one is buying that dyke's bullsh#t.
by Bdude12 September 09, 2007
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When you're friends with someone just to meet their hot sister
Why are you hanging out with him, he's such a jerk?
I know, but have you seen his sister?
I get it, sistering.
by H. Archer May 24, 2016
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To be raped and made somebody's prison bitch. (ie Shawshank Redemption)

also sistering
So we when we went to jail Mike totally got sistered.
by Chunkymonkey102 November 16, 2009
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