Lasturday

Lass-tur-day (Not last-turd-day)
The day before yesterday. (The opposite of the German word Übermorgen, which is the day after tomorrow.)

John: Dude, what happened lasturday?

Luke: We got hammered and ended up on McDonald's roof.

by Billy-Jean March 4, 2010

Lasturday

Referring to that time when you last did something.

Remember when we went skiing lasturday?

by ImUrHuck1berry February 6, 2021