That is how the mop flops proverb
Another variant of this proverb is "That's the way the mop flops."
Used to tell people should accept the current situation no matter what has happened.
I know it hurts a lot, but you've got to move on with your life. That's how the mop flops.
A: "I can't believe I didn't get the job." B: "Well, let it go. That's how the mop flops."
This proverb appears to have derived from slang among teenagers in the United States, partly due to the similar sounds in "mop" and "flop."
1.Someone viewed with contempt
2. Very bad
1. He dropped out of college and became a crumb bum.
2. The food here is crumb bum! I will never come back to this restaurant once again.