Define The Old Slip Meaning

The Old Slip
When a guy, while doing his girl doggy-style, spits on his fingers and rubs her asshole to lube it up, then whispers in her ear, "I Love You!", and jams his dick in her ass.

"Hey man, Mary sure is walking funny today."

"That's cause last night was our anniversary. She gave me a new watch, and I gave her The Old Slip!"
By Dede