Girl 1: I totally slept with Bob last night
Girl 2: OMG no way! I totally slept with him last week!
Both: *high five* We are helmet sisters
Girl 2: OMG no way! I totally slept with him last week!
Both: *high five* We are helmet sisters
by Dick Wolves June 22, 2017

by zombiemocker February 26, 2008

by broselophus rex September 5, 2011

Being sad but the next level.
Person 1: Dude are you okay you look sad
Person 2: Nah dude I’m sister sad
Person 1: Dang bro that sucks
Person 2: Nah dude I’m sister sad
Person 1: Dang bro that sucks
by andioop420 November 7, 2019

a man who is infatuated, who is utterly obsessed, with hooking up with his friends' sisters
Synonyms- Gbart
Antonyms- a normal person with decent moral standards
Synonyms- Gbart
Antonyms- a normal person with decent moral standards
by the jordyp March 2, 2017

When your mother starts having babies before your granny stops having babies, and now you are 3 years older than your aunt, but you're both raised like siblings.
by Tara Crush April 29, 2019

When a person is exposed with all his lies. (Usually with enough evidence)
This was from internet slang culture followed after James Charles.
This was from internet slang culture followed after James Charles.
-Yo, she has broken up with him.
-why?
-Someone has sent her Screenshots of his and flings's convo.
-Oof, Sister EXPOSED
-why?
-Someone has sent her Screenshots of his and flings's convo.
-Oof, Sister EXPOSED
by LOLsInChinese December 14, 2019
