To get beat in a video football game (Madden or NCAA) by 21. The person losing by 21 gets a courtesy drive once the other player hits 21. This helps to move games along.
by Biggunz240 December 18, 2010

Siblings born on the same day, but one (or sometimes two) years apart.
Possibly a play on the idea of "Irish Twins"
Possibly a play on the idea of "Irish Twins"
by Ollie794 December 11, 2016

Where two women living in close quarters time of the month, moves in sync with one another, thus becoming Blood twins!
by joe_smoothee June 16, 2011

a profile twin is like a type of social media user who has the same profile picture as you (if the pic on your profile isn't u but a photo from google and another person has the same one on theirs)
me and my friend have the same kermit the frog meme profile picture on twitter so we're profile twins
by Emilia Fernandez July 30, 2019

by SauceMilliken December 8, 2021

"The two of you are definitely cover twins!"
"I bet that they're cover twins... They're always spending so much time together"
"I bet that they're cover twins... They're always spending so much time together"
by abcdef36 September 25, 2011

When a male wears a strap-on backwards and proceeds to have sex with two women at the same time. One in front and one behind
Bro, my ex called me last night and wanted to have a three-way with her best friend. Needless to say, I brought out the twin piston
by sthrock4 May 4, 2017
