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1.
While performing a 69, you take a break. During the break you light a cigarette and use the girl's asshole as an ashtray.
I was about to eat this girl's ass, but some guy already gave her the ass-tray! I don't know about you guys, but cached shit just ain't my style.
by The Dirty Peso March 27, 2009
 
2.
during doggy style sex, smoke a cigarette. when finished, extinguish the burning end in the anus.
dude, my girl pissed me off last night, so when i was cracking her i had to pull an Asstray.
by Mailbox Agent S January 27, 2008
 
3.
When someone has an ass that protrudes so far from their body that it forms a flat surface on which a tray can be placed.
I was getting tired of holding everything while waiting in line at Walmart, luckily the woman in front of me had a large enough ass tray for me to put everything on.
by cheeseydude190 April 21, 2010
 
4.
In place of an "ash tray" instead by placing a cigarette in the Anus or Vagina.
I only use my girlfriend as an Ass-tray she's so ugly.
Ex2. I gave my Girlfriend 3rd degree burns using her as an Ass-tray last night.
by William Harrington December 26, 2008
 
5.
The container in which you relieve yourself of waste; bedpan
"The patient in room 12 needs her asstray emptied."
by London Calling April 30, 2005
 
6.
Anything that lets you sit (chair, couch, etc.) is called asstray after you get up from it. Because the seat becomes hot after you sit on it for a long period. It is a blend of ass and ashtray (ashtray is hot as people drop the ashes of cigarettes into an ashtray).
(In a bus...)
Young man: Come ma'am. You can have my seat.
Old lady: No, thanks. I do not want my bum to get roasted by the asstray.
by Le Mao September 21, 2012
 
7.
The result of a person placing there buttocks on a seat which will after result in making an ass print on the seat in a shape of a tray.
Matt: "Dude alright I'm out."

*Gets off seat*

Robert: "Dude you left an ass-tray on your seat!"
by vfx.void May 08, 2010