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

[back number] {n.} Something out of fashion, or out of date. […]

[back street] {n.} A street not near the main streets or […]

[back talk] {n.} A sassy, impudent reply. * /Such back talk […]

[backseat driver] {n.}, {informal} A bossy person in a car who […]

[bad actor] {n.}, {informal} A person or animal that is always […]

[bad blood] {n.}, {informal} Anger or misgivings due to bad relations […]

[bad egg] {n.}, {slang} A ne'er-do-well; good-for nothing; a habitual offender. […]

[bad news] {n.}, {slang} An event, thing, or person which is […]

[bad paper] {n.}, {slang} 1. A check for which there are […]