Any instrument or tool used to stretch open a man's foreskin. Similar to a speculum. Usually for the purpose of smuggling drugs and other small objects. Sometimes for sexual gratification.
"Hey Mike, can you help me get this gruckle off my junk? I think I put in too much cocaine."
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."