2 definitions by Bring an umbrella
The Dirty Brontosaurus is where you get someone on their knees, & put their arms behind their head sticking straight up. You then bind the wrist so they can't put their arms down. Use their arms to pull their head toward you forcefully while they give you a BJ.. Finish on their face, or back, or wherever might imply "dirty" to you, then leave them laying face down, arms out, like a long neck Brontosaurus.
She said she wanted to play rough last night, so we played The Land Before Time, & I made her be the dirty Brontosaurus.
by Bring an umbrella November 7, 2015
When someone is passed out so hard dropping a steaming pile on their chest wouldn't wake them up. You get a fan blowing on them on high. The you rub one out standing behind the fan, and spooge so it gets blown all over them through the fan, which hopefully belongs to them.
by Bring an umbrella August 16, 2016