adverb; adjective

Wrongly arranged, badly handled, reversed, confused, or in a complete mess.

“The booking went arseways when the dates changed.”

Seriously, truthfully, or completely; also used to show that a person is not joking.

““You deadass walked from Midtown?””

Very or extremely when placed before an adjective, as in dumb nice, dumb far, or dumb expensive.

““That new spot is dumb far from the train.””

Very, extremely, or a lot of; in other contexts it can still mean angry.

““That spot gets mad crowded after six.””

Really, completely, or genuinely; also correct or high quality.

“It was proper cold this morning.”