look up any word, like thot:
An Oaty Biscuit, is the act of wearing a condom during sexy time with your partner and crumbling a biscuit over the condom. You then proceed to go down on said partner and make "Sweet Love" or "Fucking" in your preferred position.
Did you hear about David Rich giving Alexus Flip an oaty biscuit last Thursday!?
by Cerveza April 17, 2014