fingers crossed
hope for good luck
see eye to eye
agree
by heart
memorize
break a leg
good-luck
pull one's leg
joke or tease someone
head over heels
deeply in love
have one's head in the clouds
be unaware or unrealistic about something
in the blink of an eye
extremely quickly
cold feet
nervous just before a big event
over my dead body
not unless I'm dead and can't stop you
get something off one's chest
tell someone your problems
cost an arm and a leg
be very expensive
all ears
fully listening
keep one's chin up
try to be cheerful
(my) flesh and blood
relative