English Dictionary

knuckle up

verb

(informal, chiefly African-American Vernacular) To clench one's fist(s) as though in preparation for a fight. / (informal, by extension) To approach a problem aggressively.

I had to knuckle up and defend myself in the fight.

意味（1）

(informal, chiefly African-American Vernacular) To clench one's fist(s) as though in preparation for a fight.

With a resolve to get his son away from these monsters, Isaac knuckled up and mean-mugged his opponent.

意味（2）

(informal, by extension) To approach a problem aggressively.