lunge at (someone or something)
To leap toward someone or something, especially with the intent of grabbing, attacking, or striking them or it. The criminal lunged at the police officer with a knife, but the cop was able to subdue him without difficulty. The lion lunged at the gazelle, burying its claws and teeth into the animal's hindquarters.
lunge at someone or something
to jump or dive at someone or something. The dog lunged at the man, but he got out of the way without getting bitten. The dog lunged at the bicycle.