be supposed to
You are supposed to listen to your parents.
slip/escape someone’s mind
His name slips/escapes my mind at the moment.
pay off
I finally paid off the loan.
beat the rush
I suggested that we get there by 11:30 to beat the lunchtime rush.
miss the boat
missed the boat on buying stock in the company early on
kettle of fish
I’m used to paddling, but those rapids are a whole other kettle of fish.