Grippy Slippy 

The act of a girl tightening her vaginal muscles on command as you're ejaculating; giving you the most intense orgasm you'll ever experience in your life. Then she ghost you leaving you psychologically scarred.

Bro a month ago, this girl I met hit me with the Grippy Slippy. I haven't been the same since.

Grippy Slippy by KFCTHATSFRIED May 6, 2020

Slippy grippy 

The manual stimulation of a male's penis with lubrication by another person, usually to the point of ejaculation.

Having mastered the slippy grippy, Susie was popular with her high school football team.

Slippy grippy by Brothernovember#3 February 11, 2014