Too good to be true means so attractive that it is probably a trick. It sounds too good to be true, if it seems too good to be true, it usually is.
It is the standard warning against a scam, and the full saying finishes with it usually is. It can also be sincere praise, said of something that turned out to be real.
1phrasetoo good to be trueSo attractive that it is probably a trick.
“The rent was too good to be true and so was the landlord.”
too good to be true is a phrase.
Practised in Small Talk & Everyday Phrases