double tap

double back

To retrace one's steps; to go back where one has already gone.

double booked

Of a single resource, reserved for two different users at the same time.

double bookkeeping

The tendency, among those who experience delusions, to perceive reality and the delusions as both being real, while remaining unbothered by the discrepancy or inconsistencies between the two.

double in brass

To perform two or more tasks within the same project or organization.

double over

To bend over deeply at the waist.

double taker

Something causing someone to do a double take.

tap dance

Any act or performance, especially one viewed as servile, designed to please, appease, or win the approval of others.