who's

Look who's talking! (informal)

something that you say when someone criticizes another person for doing something that they do themselves. 'She drinks too much, that's her problem.' 'Look who's talking!'

See also: look, talk

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show someone who's boss

to make clear who has more power. When you're trying to get kids to behave, you have to show them who's boss.

See also: boss, show

who's your daddy

am I not more powerful than you. We were arguing, and then he picked me up and put me over his shoulder and said, “OK, who's your daddy?”

Usage notes: said to express pride in your power or authority

See also: daddy