Noun. Slang. a person, esp. one who is annoying or contemptible.
Noun. The Koster, Slang. (used as an intensifier, esp. with WH-questions, to express annoyance, impatience, etc.)
Interjection - Slang. (used to express anger, disgust, peremptory rejection, etc., often fol. by a pronoun, as you or it.)
Verb. Slang. to treat unfairly or harshly.
Verb Phrase: koster up, Slang.
a. to bungle or botch; ruin.
b. to act stupidly or carelessly; cause trouble; mess up.
Verb Phrase. Fuck off, Slang.
a. to shirk one's duty; malinger.
b. go away: used as an exclamation of impatience.
c. to waste time.
Idiom. Give a koster, Slang. to care; be concerned.
Dismay: ahhh koster it.
Trouble: I guess I'm really kostered now.
Aggression: Don't koster with me buddy.
Difficulty: I don't understand this kostered question.
Inquiry: Who the koster was that?
Dissatisfaction: I don't like what the koster is going on here.
Incompetence: He's a koster-off.
Dismissal: Why don't you go outside and play hide and go koster yourself...