When someone from the LGBT community catfishes someone.
Frank: John thinks he met the perfect guy online. I looked him up though and I'd bet my bottom dollar that someone is rainbow trouting him.

Steve: Damn, let's hope it's not a bait and switch. Get it, Frank? BAIT and switch. I said 'BAIT' because it has to do with fishing.

Frank: God damn it, Steve.

Steve: Sorry.
by KylieCyrus October 27, 2016
Get the Rainbow Trouting mug.
1. A very colorful, very homosexual fish.
2. A word most commonly used in the phrase, "Peace out, Rainbow Trout."
Person1: Hey man, I gatta go; there's pandas mauling my grandma. Peace out, Rainbow Trout!
Person2: Yar, peace.
by Crau February 11, 2010
Get the Rainbow Trout mug.
A poop that is so big and so long that parts of it are sticking out of the water in the toilet bowl and are changing color due to oxidation.
Garrup hasnt pooped in 4 days, but today he finally made a rainbow trout and feels relieved.
by Notorious B I Scuffer July 21, 2016
Get the Rainbow Trout mug.
Covering a dick with honey and putting skittles all over it, ala ants on a log, then sucking said dick.
My wife wanted a sweet desert after dinner, so I prepared her a rainbow trout.
by Dsenight February 8, 2020
Get the Rainbow trout mug.
A good looking girls pussy. Opposite of Brown Trout. See definition.
When a good looking girl walks past: "Trout! Definately Rainbow trout!"
by DJ Harman-E March 11, 2009
Get the Rainbow Trout mug.
The after-effect of a rainbow party.

The result of one's trouser trout or slimy swimmer to be covered in multiple colors of the rainbow after a lass and her friends have each taken a turn slobbing on the knob with various shades of lipstick on.

Typically, the owner of said rainbow trout has no recollection of the events during or after the rainbow party. This is because large quantities of alcohol and/or other substances are enjoyed during.
"Did you see Ted's rainbow trout? It took three early load drops but they got every color lip-painted like champs!"
by PhoenixJC February 19, 2014
Get the Rainbow Trout mug.
A rainbow trout is a trouser trout that has been painted in the rainbow colors of the gay pride movement.

Very festive.
To add a bit of zip to the parade, Buford took out his rainbow trout and waved it around.

There was much applause.
by scodder May 14, 2010
Get the rainbow trout mug.