bus‧ter /ˈbʌstə $ -ər/ noun

1. American English spoken used to speak to a man who is annoying you or who you do not respect:
You’re under arrest, buster!

2. crime-buster/budget-buster/sanctions-buster etc informal used with nouns to mean someone or something that ends a situation or stops an activity

[TahlilGaran] Dictionary of Contemporary English ▲