transitive verb-·stabbed·, -·stab·bing
to harm (a friend, partner, etc.) by treachery
Origin of backstabback-formation from backstabber
transitive verbback·stabbed, back·stab·bing, back·stabs
To disparage or criticize (someone), usually when that person is absent.
(third-person singular simple present backstabs, present participle backstabbing, simple past and past participle backstabbed)
back + stab