back in

Verb

 * 1) To reverse a vehicle into a space.
 * 2)  A betting term from French hazard
 * 3) * 1921,, Crockford's : Or Life in the West Sketch No. III
 * Whatever you throw is your chance. I called five for the main, which is the out chance, and threw seven to it, which is the in chance. If I throw five first, I lose, and if seven I win. You can back me in by betting the odds, or you can back me out, by taking the odds, the bank answers either way.
 * Whatever you throw is your chance. I called five for the main, which is the out chance, and threw seven to it, which is the in chance. If I throw five first, I lose, and if seven I win. You can back me in by betting the odds, or you can back me out, by taking the odds, the bank answers either way.

Preposition

 * 1) In the past time of.