Everything but/bar the kitchen sink American British informal
Almost anything one can think of, and perhaps nearly redundant
When we left the rented house, we had to pack up everything but the kitchen sink to give it back to the landlord.
We had a picnic for only two days, but my mom brought everything but the kitchen sink along to use if necessary.
After Jane broke up with his girlfriend, he discarded everything but the kitchen sink regarding her.
The phrase originated around the early 1900s and the first print reference can be found in 1918 in the newspaper The Syracuse Herald. The expression became popular during World War II, where it was said that everything but the kitchen sink was thrown at the enemy.
To tell someone the truth about something that they had not understood or received false information
I have to set my wife straight about what happened yesterday.