A way of saying "Fuck that" without using the actual "F word." Used by many "edgy" teens, attempting to appear hipster and rebellious.
Person A: We have 5 hours of HW
Person B: Eff that
Verb: to suddenly bail from plans and go offline
Sally: "How did you date with Jake go?"
Claire: "He totality ananted me! And he won't reply to my texts."
Sally: "All the boys today are ananting. They think it is cool or something!"