Ish is the Hebrew word for "man" and Kanish is the Hebrew word for stuffed potato dumpling. An IshKanish is literally a dumpling made out of a human being, but colloquially it means a problem that needs to be solved.
Marcy: "Heidi, all the dates are wrong on the calendar."
Heidi: "That is a real ishkanish, but I will fix it."
Boys who enjoy yaoi (a genre in Japan that contains sexual and/or romantic relations between two men); literally translates to "rotten boy"; corresponding female : fujoshi