duck out

Leave hurriedly or secretly; evade responsibility. For example, If I can I'll duck out of the office early, or He simply ducked out on his entire family. This slangy expression originated in the late 1800s simply as duck, out being added about 1930.

The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.