naive and easily deceived or tricked;
"at that early age she had been gullible and in love"
easily tricked because of being too trusting;
"gullible tourists taken in by the shell game"
- Bill's so gullible that you could sell him anything.
- He must have been pretty gullible to fall for that old trick.
- We 're so gullible as to believe him.
- Being gullible and belittling others should both be avoided.