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.
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.