As a verb backstab
is to attack someone (especially verbally) unfairly in a deceitful, underhand, or treacherous manner, especially when they're not present in the place or situation that it happens (as if stabbing them in the back) see backbite.
As a noun turncoat is
a traitor; one who turns against a previous affiliation or allegiance.
backstab
English
Verb
(backstabb)
to attack someone (especially verbally) unfairly in a deceitful, underhand, or treacherous manner, especially when they're not present in the place or situation that it happens. (as if stabbing them in the back). See backbite.
Derived terms
*
*
turncoat
English
Noun
(
en noun)
A traitor; one who turns against a previous affiliation or allegiance.
Synonyms
* (traitor) apostate, defector, renegade, traitor