A word referring to a male that likes to date older women. Similar to a trout
(swims downstream in age) who is a 40+ male that likes to date 20 year olds, a salmon (swims upstream in age) is a 20-30 year old that likes to date cougars
Man, did you see my homey Donny, that salmon slayed 4 cougars last night at the Mix nightclub in Sacramento.
That cougar pounced on the poor unsuspecting salmon.