This task was so easy
This task was a breeze/ a piece of cake
His business is very profitable
His business is a real cash cow
I've been very busy lately
I've been busy as a beaver/ a busy bee/ as busy as popcorn on a skillet
Her husband is some important person in Samsung
Her husband is a big cheese/ big fish/ big wig
These shoes cost a lot
These shoes cost an arm and a leg / These shoes are a highway robbery
They seem to be in trouble
They seem to be in a pickle/ have a monkey on their back
She hardly ever drinks coffee with sugar
She drinks coffee with sugar once in a blue moon
He makes very little money
He makes peanuts/ chicken feed
He's just got very angry
He's just gone nuts/ He's just gone ape/He's just had a cow
She's very happy today
She's over the moon/ on cloud nine/in seven heaven today
You got some money?
You got some dough?
I felt vey uncomfortable during my speech
I felt like a fish out of water during my speech
I took a nap after school
I took a catnap/ caught some z's after school