Something that sucks to an extreme degree. Specifically, the exact degree to which something sicknasty is awesome.
That concert last night was terrible. I was expected to be wowed with solos and energetic theatrics, but instead they lip-synched with a shit recording to add up to one of the most sucknasty performances in recent history.
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."