tired and done working on whatever it is you were doing. depending on the context can also mean finished in a negative aspect such as "I didn't study for the exam and now im pootched".
Adj.
Tech/Geek term. Etymology unknown: supposed origin may be derived from a source comparing the negative denotative context of "dog" with the condition it describes.
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."