duck duty

(v) : (idiomatic, intransitive) To depart quickly or exit abruptly, especially in a manner which does not attract notice and before a meeting, event, etc. has concluded.

(v) : (idiomatic, transitive) To depart quickly or exit abruptly by way of, especially in a manner which does not attract notice and before a meeting, event, etc. has concluded.

(v) : (idiomatic, intransitive, followed by of or from) To move or act so as to achieve avoidance, escape, or evasion.

(v) : (transitive, slang) To avoid a debt; to skip out on a bill.