A day that will never come. Nonexistant holiday. Used as either a pun or a way to make someone realize what they are asking will most likely not happen and they can go screw.
Moron coworker: Hey mike when are you gonna treat the crew to coffee and bagels.
When I think of my boyfriend, my mind Instantly goes to Never~NeverLand! It's So Amazing; I can not think of anything else~Never~NeverLand is Ultimate!!!!