To be deliberately, aggressively, irrationally stupid. Similar to how people who are addicted to Oxycontin/oxycodone/painkillers behave.
I saw John steal $20 out of my wallet. When I confronted him he said fuck you and I had lost the money somewhere else. Totally oxytarded. (or) What an oxytard.
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."