I, etc. won't bite

(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.
See also: bite
Farlex Dictionary of Idioms.

I, etc. won’t ˈbite (you)

(humorous) used to tell somebody that they do not need to be afraid of somebody: You should tell your teacher that you don’t understand — she won’t bite you!
See also: bite
Farlex Partner Idioms Dictionary
See also:
  • (one) won't bite (someone)
  • (one) won't eat (someone)
  • (one) is not going to bite (someone)
  • (one) is not going to eat (someone)
  • accompany (one) on a/(one's) journey
  • accompany on a journey
  • (one's) heart goes out to (someone)
  • a stranger to (someone or something)
  • be out of (one's) league
  • be out of somebody's league