Another way of saying "extremely sneaky". Often used when someone is very suddenly surprised by someone else or when someone gets away or very quickly disappears without a trace, only to reappear later.
Jim:"What the hell happened to Chris? He was here just a second ago but now he's gone."
Brandon: "Maybe he's trying to be shneekay shneekay again."
Brandon: "Maybe he's trying to be shneekay shneekay again."
by UndeadMessenger February 19, 2009