two-faced
adjective
[ ˌtuːˈfeɪst ]
• insincere and deceitful.
• "I soon learned that he was two-faced"
Similar:
deceitful,
insincere,
double-dealing,
hypocritical,
back-stabbing,
false,
untrustworthy,
duplicitous,
Janus-faced,
deceiving,
dissembling,
dishonest,
disloyal,
treacherous,
perfidious,
faithless,
lying,
untruthful,
mendacious,