Nessa

(guest post from Markus)

Short for necessary. I originally heard this in a Mel Brooks movie which did make me laugh, but I heard an instructor use it recently and couldn't help but think "You're well over 40, no one in the classes that you teach cares if you try to say anything cool unless it ends in "...there is no homework, see you next week." or "Do you kids want me to buy you beer?"