Top definition
1) girls who became friends and then learned they have the same ex

2) girls who became friends after breaking up with a guy cheating on them

3) girls who both hate their ex (they have the same ex obviously) and bonded over that
"ally is my ex-twin and my bestie!"
by thesneeky1 May 21, 2016
Get the mug
Get a ex-twin mug for your mom Yasemin.