1. "Bout it" is short for "about it" as in "Don't worry bout it." Informal. 2. "Da bomb" is an old slang term meaning "the best." It's not used very often. 3. I'm not sure about this one. Sorry. :( I think it's slang for "that's great!", but it's not commonly used. 4. "To jockey" is a verb that means "to maneuver for a certain position or advantage." It comes from the noun "jockey" which is a person who rides horses in races.