bottom drop out
bottom fall out
To fall below an earlier lowest price.
The bottom dropped out of the price of peaches.
To lose all cheerful qualities; become very unhappy, cheerless, or unpleasant.
The bottom dropped out of the day for John when he saw his report card.
The bottom fell out for us when the same ended with our team on the two yard line and six points behind.
fall out
To happen.
As it fell out, the Harpers were able to sell their old car.
To quarrel; fight; fuss; disagree.
The thieves fell out over the division of the loot.
To leave a military formation.
You men are dismissed. Fall out!
To leave a building to go and line up.
The soldiers fell out of the barracks for inspection.