Invisibomb
Catching someone off guard by instant messaging them when said person is creeping on invisible, so as not to be detected by those wishing to partake in meaningless conversations.
Jake: AHA! i knew you were on invisible! who are you avoiding?
Tim: Dam great invisibomb. It's that slut meechal i can't avoid her!
Tim: Dam great invisibomb. It's that slut meechal i can't avoid her!