kid

/ˈkid/

Middle English kide, of Scandinavian origin; akin to Old Norse kith kid

noun

  1. a young person; especially : child —often used as a generalized reference to one especially younger or less experienced

  2. a young goat

  3. a young individual of various animals related to the goat

kids in high school

adjective

  1. younger

my kid brother

verb

  1. to deceive (someone) as a joke : to say untrue things to (someone) in a playful or joking way

  2. to fail to admit the truth to (someone)

  3. to gently criticize or tease (someone) in a friendly or good-humored way

It's the truth; I wouldn't kid you.

They're kidding themselves if they think they can win.