Originating from the youtube account Numberphile, Doing a parker square means that you have attempt to do something but didn't quite achieve accomplishing it.
Matt: Hey Brady, I solved this sodoku puzzle !
Brady: You repeat numbers in all the columns and rows.
Matt: It still sort of counts.
Brady: Face it Matt, this is a parker squaresudoku.
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.