Top Definition
A sexual act involving two people, an apple, and gravity. Participant A places an apple in their anus, while participant B takes up position below participant A's anus. Participant A then attempts to hit person B on the head with the apple. In some variations, participant B will attempt to catch the apple in his mouth, though this is not a classical Dirty Isaac Newton.
I had this girl once who loved dirty Isaac Newtons. She even ate the apple afterwards.
#dirty #sex #act #apple #anal #anus
by Haje June 09, 2010
Free Daily Email

Type your email address below to get our free Urban Word of the Day every morning!

Emails are sent from daily@urbandictionary.com. We'll never spam you.

×