during sex, when a guy suddenly (unexpectedly) decides to switch to anal and take it up a notch, much to his partner's alarm and horror
Jill was loving vaginal sex with jack, until he yelled "BEAST MODE!!" shoved it in her anus, and started violently pounding her really hard and fast
by 91m2b September 20, 2009

Person 1: "Wow, you climbed those stairs quick?"
Person 2: "Im in a rush man, had to go into beast mode"
Person 2: "Im in a rush man, had to go into beast mode"
by PizzaBoy6000 July 17, 2016

Female genitalia, for instance beast oven refers to the fact that the female has a child inside of her that more than likely will turn out to be a fucktard therefore A beast.The oven part of this should be self explanatory.
by Matt Brown.....Hear,Hear April 15, 2009

A sexy woman who seduces men with her confidence, attractiveness, intelligence, wit, independence and incredible physical appearance.
This woman is typically the envy of all other women and the desire of all men.
This woman is typically the envy of all other women and the desire of all men.
by MxdMs April 10, 2015

Person 1: Man, she’s got those beast tits, i go wild when i see them.
Person 2: Dude, be careful, you know what girls with beast tittys can do...
Person 2: Dude, be careful, you know what girls with beast tittys can do...
by 410maren November 6, 2017

an attractive person that no one actually likes and had some yummy intercourse in class the another sexy beast that no one actually likes.
by TINYGEORGE#THEBEST October 25, 2018

by ZynkDaddy November 10, 2010
