Originated in the north east of england. Refers to your arsehole just after you've taken a shit and there are bits of poo stuck onto it that need wiping off.
I've just taken a shit and I've got a proper gammy eye. This sucker is gonna take ages to wipe!
Nickname given to bales of marijuana thrown overboard or out of airplanes. Origin is reportedly from members of the US Coast Guard in the area of Southern Florida.
"Base we've got some square groupers floating outside of Miami harbor."