all ears

break a leg

cold feet

cost an arm and a leg

cry your heart out

face the music

(my) flesh and blood

get something off one's chest

give a hand,
lend a hand

have one's head in the clouds

head over heels

head start

in over one's head

keep an eye on

learn by heart,
know by heart

let one's hair down

(my) lips are sealed

makes my blood boil

neck of the woods

(an) old hand

over my dead body

pat on the back

play something by ear

pull one's leg

rule of thumb

see eye to eye

(by the) skin of one's teeth

stick your neck out

sweet tooth

thick in the head

wash one's hands of something