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8.
To give one's own self head. Auto-fellatio.
Steve has been taking yoga classes to increase his flexibility. Since he can't get any, he wants to be able to flounder.
by flounder founder April 23, 2009
 
9.
This term is used in the land of online gaming when someone receives an improper or unneeded trout. Originated in UnForums alternate reality game discussion boards.

"Wee Todd Did I Am" says Joe.

Oh, cool. "I am Sofa King. Wee Todd Did Also.", says John

"Trout" says Joe.

"I flounder thee" says John. (smacking Joe amongst his privates)
by NataSUF February 25, 2008
 
10.
A guy who will do well in life, but is still good looking. A Flounder is a really hott person who has everything going for them. Flounders tend to be risky people.
Tim is such a flounder. He knows what he is doing in life, yet the girls are all ove him. Ellie should be careful that no one jumps on her flounder.
by UWW Passion July 20, 2010
 
11.
Female who is average in skills and activity when it comes to sexual intercourse.

She may still be a bottom feeder, but she definitely shows signs of life unlike a stalefish. However, she isn't quite up to par with salmon status.
Kevin: Rumor has you you and Kate did the nasty last weekend? How is she?

Jon: Keep this on the DL, but she's a flounder. Not bad, but nothing too special.
by TWP Fisherman March 16, 2010
 
12.
To rub your bellend up and down repeatedly against someone's pouting lips
Rob? did you sleep with that girl last night?

Nah, but i floundered her a treat! She won't be needing lipstick for a while.
by Axe Wound 123 November 14, 2008
 
13.
A loud/obnoxious moron trying to keep the attention of a crowd. An outspoken drunkard.
Every party in which he attends and drinks, he flounders around.
by Adam Schalow July 06, 2004
 
14.
A flounder, much like the fish in water is very moist vagina, sometimes dripping, and can even have that fishy smell... a lot like Tom Cruise.
Oprah's flounder after a nice hot shower (without soap) is simply delicious
by Mike Titus May 28, 2006