When your bum is irritated and uncomfortable and feels as if it is red. One may find they have a case of 'red bum' is the anus is irritated and almost inflamed.
"Well, darn Larry, last night I was eating burritos and drank about 30-something beers, had redbum all day."
A pace that nobody can handle. A person can use riddium in any type of sports or task. It's simply a matter of complete domination.
GSP (with the french canadian accent): "aye'm gonna poot so much pressure on diz guy dat 'iz gonna fall, u kno. 'Iz not gonna be abel too 'andle mye riddum".
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."