The true way to say more then one fish. It might not be in the English dictionary but we all know that "fish" can't represent multiple fish.
"Yeah bro I see them...shake them feashes."
fish fishies fishes phish feash
Guy 1:"Hey dude what is that smell? I'm dry retching over here"
Guy 2:"Your girlfriend man, her gash is seriously feash, when was the last time you had her cleaned?"