When a guy goes a few days without showering and starts to get a smell on his groins and gooch that smells like tuna. It's pretty much the male equivalent to a fishy vag.
Guy1: "Hey Tom, do you want to head over to Lawn St? There's a few girls over there just drinking and chilling.
Guy2: "Yeah I'm down, just give me a second to clean up."
Guy1: "Awe man are you taking care of some tuna gooch? Got to be safe just in case."
Guy2: "Damn right dude...RIP tuna gooch."
When someone has planned to work for you but when your work destination changes, they suddenly can’t work foe you, anymore. You’ve Benedict Gooch.
P1: Can you work for me?
P2: Yes.
P1: Just an FYI, You’ll be working at this other location.
P2: Oh, no, sorry man I can’t.
P1: Man, you’ve Benedict Gooch.