When a girl is taking on two cocks at once, mostly refered to swicthing from one cock to another within her mouth.
"Hey did you see the Beach double down on Doug and Thoin?"
by Insane V April 30, 2004
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Double down describes how down a person is to do something. You're not just 'down' , you're so down, that you're double down.
Yo Dylan, you down to go to 7-11?
Yeah yo I'm double down.
by Alcazar805 August 8, 2014
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The act of standing at the urinal when you realize that you need to take a shit, so you quickly penguin foot it over to the nearest stall. Thus going from #1 to #2 in rapid fashion.
"Man I just doubled down in the shitter."

"I nearly shit my pants at the urinal, but I ended up Doubling Down just in time."
by paulyballgame September 5, 2013
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n. "Double Down"

1) of or relating to the KFC "double down"; a fast-food miracle in which the bacon and cheese are contained in two chicken patties; a cardiac death-wish

2) slang. The act of two men face-to-face holding their dicks together in one or two hands, lubricant and/or thrusting optional.
"We're both tops."
"Oh, so how do you.. you know...?"
"We mostly do oral and Double Down together."
by somethinginsodomy June 23, 2014
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-verb; a series of actions in which a male or female (generally a male), when confronted with the sibling of a former sexual partner, proceeds to engage said sibling in sexual relations, thus "doubling down"
-noun; a reference to the afore-mentioned aspect of copulating with one sibling and then the other at a later date, spoken of as though it were a status, achievement, or standard to be gained
(verb) "When Shawna's sister Latrice started dry-humping me at the costume party, I realized I had the chance to double down without either one of them figuring it out."

(noun) "One of my lifetime goals is to achieve a Double Down with identical twin blondes, giving one a Tony Danza and the other a Bareback Surprise. All together, I will have achieved the trifecta of sex maneuvers, thus sealing my name among the gods forever."
by Dave the Knave April 28, 2013
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When a guy takes and puts on a strap on above his penis, then has sex with a woman. A threesome with only two people.
ex) Brent tried to double down but Alex just couldn't get her leg high enough to do it
by Thomas sa April 18, 2011
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Means someone who is really homely looking with a hint of downs syndrome
That guys looks as if he has double downs.
by Osiris December 8, 2004
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