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.
1. To sneak out of some place: The shy student ducked out of the school dance early. When no one was looking, I ducked out.
2. To avoid or neglect some responsibility or obligation: I ducked out of mowing the lawn and headed to the beach. My kids were supposed to clean the garage this morning, but they ducked out by claiming they were too tired.