To be undesirable or unhelpful.
To come to believe an untruth.
To behave in an adulterous manner.
To become lost or mislaid.
Used other than figuratively or idiomatically: see go, astray.
To develop bad habits; to behave improperly or illegally.
(intransitive, or transitive with of) To have an insufficient amount (of).
To sell a financial product, such as a share, that one does not presently own, as in the hope of buying it more cheaply later for delivery, so as to profit from a fall in price; cf. go long.