wipeout, washout, jump to a conclusion

the "Red Wave" washout in U.S. in 2022.

Conservatives can be reasonably cheerful about their prospects in the capital in next week's general election.

ECONOMIST.COM

Boris Johnson's party is down but not out in London
A predicted Conservative wipeout in the capital may end up a washout

My dad was a D.C. policeman, and I would like to apologize (not “recalibrate”) to the Cambridge police for the president’s assumption that they “acted stupidly.” You would think that Mr. Obama would have afforded the police the same consideration he gave to the mass-murdering Muslim Army major when he said: “I would caution against jumping to conclusions.”

wipe out

— phrasal verb with wipe verb [ T ]

UK 

 /waɪp/ US 

 /waɪp/

US informal

 

to lose control, especially in a vehicle, and have an accident:

I was going too fast and I wiped out on the bend.

washout noun (FAILURE)

 

[ C usually singular ] informal

a complete failure:

The party was a washout - hardly anyone came.

jump to a conclusion
Form an opinion or judgment hastily, as in Wait till you have the facts; don't jump to a conclusion. [c. 1700]