A combination of anticipation and masturbation.
A phrase accidentally coined by Himiko Yumeno in Danganronpa v3, it means to wait in excitement of a forthcoming sexual encoutner. The concept of anticipating a sexual encounter so much, the thought itself becomes almost as pleasurable as the experience itself.
"You guys better get excited and look forward to it with antisterbation!"
"Surely you mean "anticipation"? Or have I misunderstood the nature of this encounter...?"
a sarcastic and abruptly blunt means of expressing feelings that are
unapologetic; unsympathetic; unfeeling or expressing regret for an action that has upset or inconvenienced somebody, or is likely to do so
Drew: don't give me that
Matt: I am so sorry.
Drew: me too.
Matt: HA!
Matt: I'm not at all
Drew: NEITHER AM I!!!
Drew: or am I?
Matt: in fact I'm antisorry
Drew: whoa.