One who explores another person's anus, with fingers, penis, or other instrument with such enthusiasm as if they were rummaging around for something in there. Also used as a playful insult of a friend, like calling them a penile perpetrator, fgt, or scrotum soldier.
"STFU you rectal rummager! I heard bout what you did to that other guy when you were drunk at the party, you fgt!"
Eric: We're headed to the pool. Be right back.
Kim: What should I do?
Eric: Diddle.
Kim: Huh?
Mark: Try the two fingered slot rumba.
Kim: Ok! (holding up two fingers.)
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."