OVER THE BARREL

{adv. phr.}, {informal} In the power of your enemies; not able to do anything about what happens to you; in a helpless condition; trapped. * /Bill had Tom over a barrel because Tom owed him money./ * /Ralph has me over a barrel; I need five dollars, and he won't lend it to me unless I let him use my bicycle./ Compare: ON THE ROPES.