A term created by PewDiePie, meaning when a person knows something that only a smart person would know, but doesn't know something that an avarage person would know.
Edgar knows nuclear physics, but doesn't know a difference between Lion and Cheetah, therefore he's being smartdumb.
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."