A person who was born on the same day of the year as you. A true cosmic twin was born on the same day and same year as you (aka a Sense8), but colloquially any year is permissible.
Of the past 5 dates I’ve been on, two of them have been cosmic twins. I guess that means astrology is wrong, since opposites attract.
by Marty Farty December 29, 2022

When a woman has intercourse with two different men in a short period of time resulting in fraternal / superfucundational twins being born - often of different races or color.
by The Egg Farmer June 8, 2021

Similar to Eskimo brothers, but includes receiving an STI/STD and finding out from your buddy they also have the same STI/STD from the same girl.
Alex: Dude Patricia gave me chlamydia.
Luke: dude she gave it to me too!
Together: Dude we’re snorkel twins! *highfive*
Luke: dude she gave it to me too!
Together: Dude we’re snorkel twins! *highfive*
by Billy Joe Jackson December 2, 2020

"Bro I heard you banged that girl, we're eskimo bros now"
"Nah my guy we didn't have sex, me and you are just diddle twins
"Nah my guy we didn't have sex, me and you are just diddle twins
by MountainMen April 14, 2019

by The OG DJ EJ July 29, 2022

by RealAmoeba October 2, 2018
