hold (your) horses

wait.

Hold your horses, Colin, I'm working as fast as I can!

Usage notes: usually used as an instruction, as in the example

• show true colours
• show up
• show what are made of
• show what you are made of
• show who's boss
• show your face
• show your hand
• show your mettle
• show your teeth
• show your true colours
• shrinking violet
• shrug off
• shrug shoulders
• shrug something off
• shrug your shoulders
• shuffle off this mortal coil
• shut down
• shut eyes to
• shut eyes to something
• Shut face!
• Shut gob!
• Shut mouth!
• shut off
• shut off something
• shut out