Dirty Bertha 

When a man is with a large woman, and she reaches underneath her fat rolls to produce "Boob Schmega" and then procedes to slap him in the forehead with it.

When I commented on her size, she proceded to hit me with a dirty bertha-But I fucked her anyway!

Dirty Bertha by Bods July 1, 2006

Dirty Bethan

When a sexual parter likes being both whipped and choked with a belt, so, as you're choking them, you pull the belt away to whip them, leaving their neck burning so it feels like the belt is still there, but it is not.

You only need one belt to do a dirty Bethan.

Dirty Bethan by BJROGER April 7, 2020

dirty berhan 

when In an orgy a stripper comes and takes 3 dicks at once on her vagina while saying ''make me scream daddy put me on the cover of vogue...''

last time I saw berhan he did a dirty berhan.

dirty berhan by fuge_in-e_minor December 1, 2020

dirty bertram 

The act of cutting a fleshlight out of you dog or cats ass and using it on your best friend

Chad: Dude did you see that Daniel went to jail yesterday?
Brad: Yea dude i heard that he did a Dirty Bertram on Mike

dirty bertram by Mastersex123 September 27, 2022

The Dirty Bertrand 

Similar to a Dirty Sanchez, when one lets their unwashed bellybutton begin to stink then picks said bellybutton and wipes it on the upper lip of an unsespecting victim.

I gave a girl the Dirty Bertrand last night, she threw up in her shoes.

The Dirty Bertrand by bbbeaver October 13, 2012