champ
n. countablen. a short way of saying 'champion'. You use it to talk about someone who has won a competition or to be friendly to a child or friend.
n. a shortened, informal form of 'champion', referring to a winner of a contest or used as a familiar term of address. Primarily colloquial in register.
The little boy felt like a champ after winning the race.
After three hours of hard work, he finally finished the project like a champ.
While technically a diminutive of 'champion', the term is frequently employed as a patronising or overly familiar vocative in professional settings where formal titles are expected.
Clipping of Champlain (“Lake Champlain”).
Often used as a vocative (a name used to address someone directly), particularly in sports or casual encouragement.