Who's your daddy?

Meaning

A cocky, often provocative statement used to assert dominance, victory, or superior skill over someone else. It is usually used in competitive contexts, like sports or video games.

Arrogant, boastful

Used in a sentence

• I just beat my brother at chess and shouted, who's your daddy?
• The baseball player hit a home run and yelled at the pitcher, who's your daddy?
• She won the tournament and teasingly asked her opponent, who's your daddy?