phony

adjective
UK /ˈfəʊni/
US /ˈfoʊni/

Not real or true; fake.

He tried to pay with a phony dollar bill.


OTHER MEANINGS

2. A person who pretends to be something they are not.

Everyone found out the new manager was a phony.

3. Something made to look real in order to trick people.

The website was a phony copy of the real store.

4. Not sincere or honest in the way you act.

Her phony smile made me think she was hiding something.