figurative. colloquial. Dishonestly come by; made, obtained, or sold in a way that is not straightforward.
slang. Dishonest; dishonestly come by. (Opposed to square or straight.) Cf. crooked, adj. 3b, and cross, n. 29.
Criminals' slang. Of things: dishonestly come by (see also quot. 1954). Cf. crooked, adj. 3b, bent, adj. 5a, 5b.
slang. Acquired deviously, illicitly, or cleverly. Cf. organize, v. 4. Now rare.