B

[back door]  {n.},  {slang},  {citizen's band radio jargon}

Rear of vehicle.

[back down] or [back off]  {v.},  {informal}

To give up a claim; not follow up a threat.

Bill said he could beat Ted, but when Ted put up his fists Bill backed down.

* /Harry claimed Joe had taken his book, but backed down when the teacher talked  […]

[back in circulation]  {adv. phr.}

1. Socially active once again (said about people); back on the dating circuit after a divorce or a romantic breakup.

Now that Sully is divorced from Jim she is hack in circulation.

2. Once again available to the  […]

[back number]  {n.}

Something out of fashion, or out of date.

[back of] or [in back of]  {prep.}

1. In or at the rear of; to the back of; behind.

The garage is hack of the house.

Our car was in hack of theirs at the traffic light.

2.  {informal}

Being a cause or reason for; causing.

* /Hard work was  […]

[back out]  {v. phr.}

1. To move backwards out of a place or enclosure.

Bob slowly backed his car out of the garage.

2. To withdraw from an activity one has promised to carry out.

* /Jim tried to back out of the engagement with Jane, but she  […]

[back seat]

See: [TAKE A BACK SEAT].

[back street]  {n.}

A street not near the main streets or from which it is hard to get to a main street.

We got lost in the back streets going through the city and it took us a half hour to find our way again.

Compare: [SIDE STREET].

[back talk]  {n.}

A sassy, impudent reply.

Such back talk will get you nowhere, young man!

See: [TALK BACK].

[back the wrong horse]  {v. phr.}

To support a loser.