Another way of saying, "All Day Sex (after the kids go to school till 3:00 when they get out)". It's treated like a Mexican holiday, with the Tequila shots, etc. between bouts. Also, sometimes means an extra long time having a hard-on without ejaculation, or an all day hard-on.
Hey, you wanna have FatTuesday with me tomorrow? (doesn't matter what day of the week it is). Or: Damn, I was Fat Tuesday after I saw you in that outfit this morning.
When you have to pee in a movie but don’t want to miss anything, and must do the following mental equation: will the amount I have to pee cause enough discomfort to diminish my attention capacity for the remainder of the movie to an extent which is greater than the amount of the movie I would miss by making a mad dash to the restroom.
I saw Satantango last night, wonderful film but by the 5th hour I had to start doing pee calculus.