Wiktionary
for fake
a. (context humorous English) Not for real.
Usage examples of "for fake".
She looks as if she might have stepped straight off the set of an infomercial for fake fingernails or home permanents.
Half of Baltimore knows to look for fake dog poop if they want to burgle our house.
But just call her out of the blue for fake IDs, and she's right there like an old dog ready to please.