really expensive
cost an arm and a leg
without having to think carefully
off the top of my head
listening carefully
(to be) all ears
really annoying
pain in the neck
pretending to be serious but really joking
pulling my leg
time feels like it's going really fast
time flies
really enjoyed something and had a great time
whale of a time
rarely, almost never
once in a blue moon
only just in time, almost too late
the eleventh hour
to delay something for your advantage
buy time
really easy
a piece of cake
reveal a secret
let the cat out of the bag
make decision about people based on what they look like
judge a book by its cover
avoid answering a question
beat around the bush
to be very nervous and anxious
butterflies in one's stomach
to agree
to see eye to eye
