[cover one's tracks] or [cover up one's tracks] {v. phr.} 1. […]

[cover up] {v.}, {informal} 1. To hide something wrong or bad […]

[cowboy] {n.}, {slang}, {informal} A person who drives his car carelessly […]

[crack a joke] {v. phr.}, {informal} To make a joke; tell […]

[crack a smile] {v. phr.}, {informal} To let a smile show […]

[crack down] {v. phr.}, {informal} To enforce laws or rules strictly; […]

[crack the whip] {v. phr.}, {informal} To get obedience or cooperation […]

[crack up] {v.} 1. To wreck or be wrecked; smash up. […]

[cracked up] {adj. phr.}, {informal} Favorably described or presented; praised. - […]

[crackpot] {n.}, {attrib. adj.}, {informal} 1. {n.} An eccentric person with […]