[kangaroo court] {n.} A self-appointed group that decides what to do […]

[keekles] Usually used while deliberately acting like a newbie.

[keel] See: [ON AN EVEN KEEL].

[keel over] {v.} 1. To turn upside down; tip over; overturn. […]

[keen about] or [keen on] {adj. phr.} Very enthusiastic about someone […]

[keep (one) posted] {v. phr.} To receive current information; inform oneself. […]

[keep a civil tongue in one's head] {v. phr.} To be […]

[keep a close check on] See: [KEEP TAB(S) ON].

[keep a stiff upper lip] {v. phr.} To be brave; face […]

[keep a straight face] See: [STRAIGHT FACE], [DEADPAN].