yimceecahn
A nickname, usually used to define an extremely obnoxious younger sibling or, in extreme situations, make him/her mad, in the event of him/her teasing/making fun of you, when they know you can roast them to a crisp at a moment's notice.
"Hey, bob, You have more pimples than Rihanna without makeup!"
"Shut up, Yimceecahn."
"Shut up, Yimceecahn."