adj.
1 criminal, dishonest, illegal, unlawful, illicit, wrong, perverse, Slang Brit bent:
Selling a stolen painting is crooked.
2 bent, bowed, askew, awry, deformed, distorted, contorted, lopsided, twisted, misshapen, disfigured, warped, gnarled:
Because of the constant west wind, the trees are all crooked.