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When you’re watching others have intercourse while draped in a white sheet with the eye holes cut out to appear as a friendly ghost to those having the intercourse.
I refused the Devil’s 3some but I did let him Casper in the corner.
Casper by Travelingfilthcircus November 7, 2020
When a guy is giving it to a girl from behind and he substitutes his friend in right when he's about to cum. He runs outside and waves at her through a window. She is left wondering who the hell is fucking her now.
1) Dude, I did a casper to my girl last night. Maybe that's why she won't talk to me..
Casper by BrainWave. May 9, 2009
Casper is a rare name meaning sexy, muscular, hot. Casper is a great musician and great in bed.

If you get into a relationship with Casper you will not be disappointed.
"Damm Casper, your to sexy and muscular!"
Casper by Mikael December 15, 2016
Casper is Typically a boys name. Casper's Are the most resourceful people around. They are excellent gamers and are amazing with coding, computers and robotics. Some Casper's are A-romantic and A-sexual.
Casper is amazing
Casper by Invincible Nightmare November 6, 2017
(v.) The act of mutually ghosting, also known as friendly ghosting. When both parties do not call or text one another after a date, hang out or hookup.
After we hung out last week, we both caspered. It's for the best.

He was a really nice guy, but something just didn't click and after we just caspered each other.

He told me he 50% supported Trump, so obviously not for me. Thankfully we caspered.
Casper by dn0090 September 3, 2019
The best guy ever and I love him so much and he’s the best boyfriend ever. CASPER I LOVE YOU SO MUCH
I love you Casper
Casper by Marsthegayplanet December 28, 2021