The scullions and lower menials of a court, or of a nobleman's household, who, in a removal from one residence to another, had charge of the kitchen utensils, and being smutted by them, were jocularly called the "black guard"; also, the servants and hangers-on of an army
A scoundrel; an unprincipled contemptible person; an untrustworthy person. Usually, only used to refer to a male person. A blackguard may also refer to a man who uses foul language in front of a woman, typically a woman of high standing in society
subject to laughter or ridicule; "The satirists ridiculed the plans for a new opera house"; "The students poked fun at the inexperienced teacher"; "His former students roasted the professor at his 60th birthday"