SSDD would be the acronym. The words means that you're doing the same stuff you did previous, but on different day.
Army buddy: So what are we going to do today?
Army buddy 2: same shit different day.
Army buddy: That's just great.
Army buddy 2: same shit different day.
Army buddy: That's just great.
by weegeebeegee February 20, 2011
You take a shit on a tuesday night at 11:55 P.M and you wipe your ass wednesday morning at 12:05 A.M that would be same shit different day.
by Sylvain Champagne October 29, 2020
Person 1: What you been up to
Me: Oh you know the Same Shit Different Day
Person 2: That is peak bro
Me: Oh you know the Same Shit Different Day
Person 2: That is peak bro
by Svirgo19 January 14, 2020