all ears
fully listening
the naked eye
if something can be seen with the naked eye, it can be seen without the help of a microscope
(by the) skin of one's teeth
just barely
head over heels
deeply in love
cold feet
nervous just before a big event
the neck of the woods
nearby location or region
to be/get tongue-tied
that you get when you can't seem to find the right words to say, and so you are unable to speak
face the music
meet, stand up to unpleasant consequences, for example, criticism or punishment
achilles heel
small fault or weakness in a person or system that can result in its failure
turn a blind eye
to ignore something that you know is wrong
keep one's chin up
try to be cheerful
by heart
memorize
over my dead body
not unless I'm dead and can't stop you
get something off one's chest
tell someone your problems
to stab someone in the back
to say nasty things about someone when they are not there
to have a bun in the oven
to be pregnant
head start
an earlier start
see eye to eye
agree
cost an arm and a leg
be very expensive
play something by ear
do something without a plan
in the blink of an eye
extremely quickly
have one's head in the clouds
be unaware or unrealistic about something
itchy feet
to be restless and have a strong desire to travel
break a leg
good-luck
skeleton in the closet/cupboard
hiding a shocking secret about yourself
(an) old hand
an experienced person
(my) flesh and blood
relative
pull one's leg
joke or tease someone
let one's hair down
relax, have fun
to put your feet up
to relax
thick in the head
not very intelligent