Green’s Dictionary of Slang

1. (US Und.) to throw out (of a place).

1969

B. Jackson Thief’s Primer 148: Once I got jumped out of a building out in west Texas.

2. (US black) to be lir./fig. unfaithful.

1961		S. Paige in Sat. Eve. Post 11 Mar. 107/4: I’d jumped out on my contract and gone to Bismarck in 1934.
1986		Miami Vice [NBC-TV] You been jumpin’ out on me! [HDAS].

3. (US Und.) to expel from a street gang, a ritual that involves beating up the departing member [opposite of jump in v.].

1997

G. Sikes 8 Ball Chicks (1998) 115: He nodded towards the skinny girl. ‘She’s still in [the gang], ’cause no one ever jumped her out.’.