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to bust a cap
01
to shoot bullets from a gun
What is the origin of the idiom "bust a cap" and when to use it?
The idiom "bust a cap" is believed to have originated from street slang in the United States, particularly within urban communities. It is used informally to mean firing a gunshot or using a firearm to resolve a conflict or intimidate others.
Example
He threatened to bust a cap if anyone came near his property without permission.
Last year, the gang members busted a cap to assert their dominance in the neighborhood.
If the intruders don't leave, he will likely threaten to bust a cap to protect his property.
He once busted a cap to protect his family from a potential threat.
In the intense negotiation, they are willing to bust a cap and walk away from the deal if their demands aren't met.