have your head in the clouds
be unaware or unrealistic
have cold feet
be nervous
cost an arm and a leg
very expensive
alive and kicking
still functioning in a good way
break a leg
wish someone luck
pull someone's leg
joke with someone
have a cheat day
eat whatever you like
burn out
very tired
back on your feet
recovered from sickness or injury
out of shape
unfit
face the music
deal with a problem
fit as a fiddle
excellent shape