Brownie Mix

The act of sticking your thumb up your butthole then subsequently inserting it in your partner's butthole. Both parties then lick the content of their own thumbs similar to when licking the brownie batter off a whisk.

My girlfriend and I had some brownie mix after our Chipotle date.
My partner and I used brownie mix to spice up our relationship.

by Browniemixlover69 August 9, 2021

brownie mix

A person who is black on the outside and white on the inside or vice versa.

Oh you mean Joe, yeah he's a real brownie mix.

by Goober February 20, 2015