The act of officially claiming that someone ducked out of an argument. IMPORTANT NOTE: The people still in the argument are the people who are eligible to claim a SPNAK. Claiming a SPNAK is basically a way for the remaining party to celebrate victory by default. v. To claim a SPNAK. interj. The cry (typed out) given when claiming a SPNAK. Not a good thing to be on the receiving end of; of course, if this is the case, you're probably gone anyway, so you'd never know. Oh, but they do.
Bob : "So I slept with your wife yesterday"
Jack : "Well, I declare SPNAK on you"
* Jack walks away