Can mean anything from 'fucking' or 'to fuck', but is becoming just an exclamatory word(such as, in place of saying 'Wow!' or 'Oh my!'). Also used in place of 'cool' or when there just isn't anything better so say, and you want a conversation to end. Usually pronounced in a very long and drawn out way.
"I don't care who Michael schtoops on his own time."
"Hey Lindzko look at this Whopper Jr. I ordered with extra cheese."
"Hey Lindzko I just failed my rocket science final, so now I'm going to kill myself."