A term/meme originally coined on The Friend Society Forums. That has spread to other forums.

1. When a pornographic movie unexpectantly becomes a beastiality movie by the introduction of an animal at the point when the viewer is usually fully aroused, often to the disgust and dismay of the viewer.

2. When a male animal is introduced into a pornographic movie, often taking the female actress engaged by complete surprise.

3. When one is viewing a pornographic website and is unexpectedly exposed to questionable or relatively disgusting or unarousing material.

4. Any unexpected boner killing material found in a pornographic movie or website.

The term is used as an expression of surprise and disgust.
I was viewing this porn site once and it was full of really hot girls, then all of a sudden, BAM, ambush horse cock!

That ambush horse cock totally killed my boner!
by tfcdomprice December 10, 2007
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when your phone rings and instead of it being the person you expect, it is that person along with 5 other people who want to get into a lengthy conversation about a given topic.
"man, the other day I was shopping for socks and TJ Maxx and I got ambush conference called."
by Monty13 February 17, 2010
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Being hit up for a charity donation at a store checkout register. Stores know that everyone in line behind you will think that you're a cheap ass if you don't give. Ain't peer pressure great?
John: Wanna go out to a bar tonight?

Rick: Dude, I can't. I just lost my last 5 bucks in a Checkout Charity Ambush at the grocery store!
by Cicerone1 April 28, 2013
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In legal terms: Sexual assault.

In the lingo of sexual deviants (=95% of the male population): The act which will "make you a... sex offender... hm, pordon me!... a MAN"
While it is quite obvious that most "men" are petty slaves to their depraved appetites, it is refreshing to hear someone being honest about their wish to sexually assault the "female species" via a "bukkake ambush."
by The Happy Humanist July 27, 2010
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The situation that unfolds when a parent comes unexpectedly and without invitation into the room of their adult kid, who i still living at home, to tell them to get a job or look for employment right now.
"Kevin, ich hab dir gestern gesagt du sollst dich bewerben, hast du es getan? NEIN?! WARUM NICHT!?" That is a job-ambush
by Runenwächter August 20, 2013
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When a girl fails to inform her male partner that she is on her period before they have sex.
I pulled out and it was a scarlet ambush!
by kuntfuq September 25, 2020
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Ambush, when you think youre surrounded by alot of females but it turns out their really all traps.
Man last night i was in da club and i waa surrounded by all these good lookin girls but i came to find out after checking them out closely and it turned out i was in a ambush! I had to get outta there fast homie!
by Q-baller September 08, 2018
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