A slap delivered with the back of one's hand instead of the palm-side of an open hand. / (martial arts) A controlled landing, slapping to the mat with one's back.

The smaller of two channels in a river that diverge to form an island. / A secondary channel of activity, typically in parallel with primary channels and somewhat independent of them.

Alternative spelling of backchannel

Occurring away from publicity, or in mean surroundings; backstreet.

(intransitive) Return to where one came from. / (transitive) To retrieve, to have an item returned. / (transitive) To do something to hurt or harm someone who has hurt or harmed one; to take revenge.

(transitive) To be treacherous or faithless to; betray. / (transitive) To fail to keep; to renege on. / Used other than figuratively or idiomatically: see go back, on.

(idiomatic) To retaliate against; to take revenge on.

Alternative spelling of backslapping

A withheld payment for work which has already been completed, or which could have been completed had the employee not been prevented from doing so.

to retreat from a position / to move backwards / to withdraw from an undertaking / to pull something back or apart