(one) won't bite (someone)
Someone has no reason to be afraid of one; someone should not be shy about approaching or talking to one. Don't worry, child, I won't bite. I just wanted to give you a message to pass along to your father. This is your Uncle Jack, son. Well, go on and shake his hand, he won't bite you. Well, come on in, I won't bite you! Actually, I have very good news for you—you got the promotion!
Farlex Dictionary of Idioms. © 2024 Farlex, Inc, all rights reserved.