Top definition
A backflip while moving forward, usually done off of one foot while running
a gainer is all about getting the balls to do it, its really not that hard.
by blazed December 09, 2004
Get a gainer mug for your bunkmate Trump.
Aug 11 Word of the Day
A phrase to describe someone who is cognitively degenerating. Synonym of "going off the deep end". Can have varying degrees of severity.

Reference to the song "Hey You" by Pink Floyd. The line "and the worms ate into his brain" makes no sense in an otherwise linear and literal narration throughout the lyrics.
"My boyfriend has a total case of brain worms. He told me the cat was bugged so the Feds could listen in on us having sex..."

or

"You totally stumbled over that entire sentence. Can't speak English all of a sudden? What, do you have brain worms?"
by _Jez_ October 03, 2009
Get the brain worms neck gaiter and mug.
2
A person who, usually due to the sexual stimulation he/she obtains from it, intentionally gains weight.
Man, Bill must be a gainer; he's put on 20 pounds in the last month!
by B December 01, 2004
Get a gainer mug for your coworker Jovana.
3
A running reverse backflip that can be done off a springboard or a platform. Many people can't do them due to the mental block of going upside down, but they really aren't that hard.
Yo did you see him pull that gainer of that 30 foot platform?
by Sklarbabies January 04, 2006
Get a gainer mug for your brother Abdul.
4
Gainer is slang for the diving trick reverse. The category number is 300. For Example, a reverse flip (usually the term for gainer) is 302, and reverse double would be 304. A reverve is done when walking forward with a full approach, and not running. Many inexperienced divers run on the board, and could very easily slip. Gainer 2 and a half, 305, pike is the dive Greg Lougains hit his head on in the Olympics.
My personal favorite dive is a 304 tuck, which is a reverse double, but I like to call it, "gainer double."
by alex February 22, 2005
Get a gainer mug for your friend Zora.
5
a tricking move that is a one footed back flip.
mate i wish i could gainer- please be my friend.
by gD-bint April 25, 2007
Get a gainer mug for your brother-in-law Trump.
6
One having sex with a nanny, or babysitter in austin
Dude, its been 10 years since I did a Gainer!!
by arieslion August 28, 2010
Get a gainer mug for your cousin Julia.