What is Slip Trick?
1.
To put your penis in the anus of an unsuspecting female partner. This trick works best while the female is on top. While she is riding you, grab the base of your shaft with one hand and thrust it in and out of her vagina quickly, then quickly, on the next inward thrust, aim it right for her
Dude I was railin' Julie last night, and I gave her the old slip trick.
