not hold (your) breath

to not expect something to happen quickly.

She wants the company to apologize for damaging her reputation, but she isn't holding her breath.

Usage notes: often used in the form don't hold your breath:

If you're waiting for the next big cut in computer prices to buy that powerful new machine, don't hold your breath.

Etymology: based on the idea that it will take longer for the thing you are waiting for to happen than the amount of time you can hold you breath (= stop breathing)

• have had more than fair share of something
• have had more than has had hot dinners
• have had more than someone has had hot dinners
• have had more than your fair share of
• have had more than your fair share of something
• have had your chips
• have had your day
• have had your fill
• have had your fill of
• have had your fill of something
• have half a mind
• have half a mind to
• have half a mind to do something
• have half an ear on
• have half an ear on something
• have half an eye on
• have half an eye on someone
• have half an eye on something
• have hand in the till
• have hands full
• have hanging over head
• have hanging over your head
• have head in the clouds
• have head screwed on
• have head screwed on right