Definitions by mistress

PIV 

penis in vagina sex (TLA/three letter acronym)
It can be used as a verb as well as an adjective

Verb- "I don't feel like PIVving tonight."
Adjective- "We had PIV sex for the first time last night."

PIV by mistress March 29, 2005

Coot Nanny 

A married man's fling with his children's babysitter.

Wife: "What the fuck is going on?"

Husband: "Sorry baby; I couldn't pass up that coot nanny."

Coot Nanny by Mistress November 23, 2004