leave the nest

eat and leave no crumbs

Synonym of eat (“to be very good at something; to rule; to rock”).

feather one's nest

To achieve benefits, especially financial ones, by taking advantage of the opportunities with which one is presented; to amass a comfortable amount of personal wealth; especially, to do so to a degree that involves venality.

French leave

A departure taken quietly and unnoticed, without asking for permission or informing anyone.

hurrah's nest

pandemonium (state of chaos and confusion).

leave a sour taste in one's mouth

To give one an unpleasant feeling or memory.

leave at the door

To dispense with something for now; to forget about it situationally, or omit or discard it in a given place or instance.

leave behind

To abandon.

leave for dust

To leave or abandon someone alone without helping or caring for them.