to have a second, secret life that is usually not socially acceptable.

The investigation uncovered details of Boley's double life, including secret bank accounts and a private post office box.

Usage notes: also used with the verb live:

Nobody in France seemed to really care that he lived a double life.

• throw off
• throw off balance
• throw off something
• throw off the scent
• throw on
• throw on mercy
• throw on someone's mercy
• throw on something
• throw on the scrap heap
• throw open something to
• throw open something to someone
• throw open something to something
• throw open to
• throw open to someone
• throw open to something
• throw out
• throw out something
• throw out the baby with the bath water
• throw someone a curve
• throw someone a curve ball
• throw someone for a loop
• throw someone in at the deep end
• throw someone into a spin
• throw someone into a tizz
• throw someone into a tizzy