duck out

verb4

1. •
   To depart quickly or exit abruptly, especially in a manner which does not attract notice and before a meeting, event, etc. has concluded.

   • Wile they was still talking along these lines, the orchestra begin to drool a Perfect Day, so I ducked out on the porch for air. — 1921
2. •
   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.

   • The four-term Democrat, known to critics as "King Kevin" and "Mayor De Luxe," has been threatened with recall petitions and recently ducked out the back door of a restaurant to avoid picketers. — 1981
3. •
   To move or act so as to achieve avoidance, escape, or evasion.

   • In the one moment he saw his opponent ducking out of his field of vision and the background of white, watching faces; in the next moment he again saw his opponent and the background of faces. — 1911
4. •
   (slang) To avoid a debt; to skip out on a bill.