snap at (somebody) = speak sharply/angrily to somebody
- I simply asked him what time he had got there and he snapped at me!
- Don 't snap at each other. You 're brother and sister.
- He is the kind of person that snaps at you for no reason.
- You 're always snapping at me.
- Don 't snap at him. He 's only ten.
- You shouldn 't snap like this at your parents.
- I didn' t snap at him. I just wasn 't in the mood to talk.