noun, noun or participle which takes 'suru', transitive verb
play-biting; mouthing; nipping
Refers to gentle, non-aggressive biting, typically by pets or young animals. Often used in the context of dogs or cats playfully mouthing hands or objects.
子犬が指を甘噛みするのはよくあることです。
It's common for puppies to play-bite fingers.
猫の甘噛みは愛情
A cat's gentle nipping is said to be a sign of affection.