bust·er 
/ˈbʌstɚ/ noun
plural bust·ers /ˈbʌstɚ/ noun 1 [count] a : a person or thing that stops or prevents something — usually used in combination ▪ crime-busters [=people who stop crimes, who catch criminals, etc.]
b : a person or thing that breaks something apart — usually used in combination ▪ The new drug acts as a clot-buster. [=it causes blood clots to break apart] 2 US, informal + somewhat old-fashioned — used to address a man who is behaving in a way you do not like ▪ Wait a minute, buster. You're trying to trick me, aren't you?
b : a person or thing that breaks something apart — usually used in combination ▪ The new drug acts as a clot-buster. [=it causes blood clots to break apart]
