A
Ants in one's pants
"Lisa had ants in her pants the day before her interview."
Unable to sit still or remain calm out of nervousness or excitement
Let the cat out of the bag
"Who let the cat out of the bag about the surprise party?"
Reveal a secret
Smell a rat.
" I asked my brothers not to tell my parents that I went out, but I could smell a rat as soon as I opened the door."
Begin to suspect trickery.
Cat nap
"I'm going to have a cat nap while you're cooking dinner."
A short sleep
A little bird told me
"A little bird told me that you are thinking of quitting your job."
I heard something (usually secretive or unknown) from someone (not named)
Take the bull by the horns
"If you really think you deserve a promotion, you'll have to take the bull by the horns"
Face a challenge or danger boldly
Chicken out
"I was going to take a ride on Jeff's motorcycle, but I chickened out when he gave me a helmet to wear."
To decide not to do something out of fear (usually just before)
Nest egg
"We have a nest egg that we are going to use for our wedding"
Money saved for the future
Until the cows come home
"I could eat pizza and ice-cream until the cows come home."
For a very long time
Fishy
"I knew something fishy was going on when I saw all of my friends' cars in my mom's driveway."
Something suspicious
Raining cats and dogs.
"I forgot my umbrella, and it was raining cats and dogs."
Raining heavily
Horse around
" If you're going to horse around, please go outside."
Play intense or roughly
Holy cow!
"Holy cow! I can't believe you ate everything on your plate"
Wow! I'm surprised!
Hold your horses!
"Hold your horses! I'll be done in the washroom in a minute."
Wait and be patient!
Eager beaver
"Ever since he got his new tools my husband has been an eager beaver around the house."
A person who is excited about doing certain work