When a Man fucks his girlfriend in their ass then mouth without cleaning it.
Jordan: Hey I was talking to your girl and her breath is just terrible

Andrew: Oh ya, I gave her a dirty Andrew last night
by Settingthingsstrait April 15, 2020
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When a guy takes a shit in another guy's mouth, then proceeds to pack the shit down the poor bastard's throat with his dick until he pukes it out for use as anal lube.
Tom: You got something in your teeth bro, it looks like fudge.

Tim: Nah man thats shit still stuck in there from the Dirty Andrew the foreign exchange student gave me last night.
by Sylvezta February 28, 2009
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When a man is having sex with a girl in missionary position and is about to pull out and ejaculate on her face, he instead points his penis up and shoots it in his own mouth.
Man I am really regretting that Dirty Andrew last night it tasted like shit!
by Trendy Libtard October 26, 2020
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When doing two girls, and one gives oral after the other gave anal, and you came both times, a dirty Andrew is the cum exchanged between the two girls while they kiss each other.
Last night, I busted a nut so hard in (girl 1)'s ass but then (girl 2) went down on me and I did it again. You should have seen them swapping a dirty Andrew while I nearly passed out.
by Ann Derrick Tock October 24, 2020
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When you're jerking off and blow a load on the carpet, but to avoid getting in trouble you blame it on the dog.
My mom saw my load on the carpet. Luckily I pulled a Dirty Andrew and she punished the dog.
by Bitwcmpunk434 February 16, 2022
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A full grown ass tween, that looks like a lesbian tennis player. Thinks girls are "Icky". Never seen a vagina with the lights on in real life. See also: Cake Boy, or Midnight Golfer.
Wanted to go to the gentleman's club, but naked girls make Dirty Andrew want to write his congressman.
by NeverBeAnAndrew June 18, 2020
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