American, informal

if your telephone rings off the hook, it rings a lot.

The box office phones were ringing off the hook all day.

• cross swords with someone
• cross that bridge when come to it
• cross that bridge when you come to it
• cross the line
• cross the Rubicon
• cross to bear
• cross your fingers
• cross your mind
• cross your path
• crowd-puller
• crown it all
• cry-baby
• cry eyes out
• cry for the moon
• cry heart out
• cry like a baby
• cry out for
• cry out for something
• crystal clear
• cry wolf
• cry your eyes out
• cry your heart out
• culture shock
• culture vulture
• cupboard love