two-faced
[adjective]
Synonyms: hypocritical, deceitful, dissembling, duplicitous, false, insincere, treacherous, untrustworthy

[TahlilGaran] English Synonym Dictionary ▲

ˌtwo-ˈfaced adjective informal
changing what you say according to who you are talking to, in a way that is insincere and unpleasant – used to show disapproval:
He’s a two-faced liar.

[TahlilGaran] Dictionary of Contemporary English ▲

two-faced
a two-faced person says nice things about people when they are with them, but bad things about them to other people.
Have you seen what he wrote about us? He seemed so nice when we spoke on the phone - what a two-faced bastard!

[TahlilGaran] English Idioms Dictionary ▲

two-faced
disloyal, untrustworthy
I think that our supervisor is two-faced and cannot be trusted.

[TahlilGaran] English Idioms Dictionary ▲

two faced
adj. Insincere; disloyal; deceitful.
Don't confide too much in him as he has the reputation of being two-faced.
Compare: SPEAK WITH A FORKED TONGUE.

[TahlilGaran] English Idioms Dictionary ▲