catch a cold

a cold day in July

The time of occurrence of an event that will never happen.

blow hot and cold

To behave inconsistently; to vacillate or to waver, as between extremes of opinion or emotion.

catch a body

to kill, to murder

catch a break

To experience the minimal amount of good luck or a favorable outcome.

catch a case

To be infected with a disease; used with of.

catch a date

Of a prostitute, to secure a client who is willing to pay for services.

catch a fade

To get knocked out (struck and rendered unconscious).

catch a falling knife

To buy a financial instrument whose price is falling rapidly.