The look depicted on one's face, which resembles that of a trout, often caused involuntarily, due the contortion and spasm of their facial muscles after ingesting large quantities of MDMA, also known as gak or ecstacy.
"Gee Patty, just have a look at Maud's face, she looks as though she had fun out on the gak last night because she is seriously trouting!!"
by Matthec7 January 15, 2009
to lie ontop of one's friend/ partner (preferrably not strangers as it could get a tad awkward) and flop your body up and down like a wet fish, being sure to keep your arms straight at your sides at all time. Often used to initiate sexy time.
by fo shizzle hizzle April 02, 2009
"Jesus, Mary and Joseph! Did I really take a sound trouting in that Triathalon. Wanda whooped my backside verociously!"
by Mr. Fifth Place August 27, 2009