Yesterday's Gravy 

Old news; something that has fallen out of trend

Stranger 1: "Hey! Did you hear about that movie that came out last Friday?!"

Stranger 2: "That's yesterday's gravy bro."

Yesterday's Gravy by Hellbound Harry March 30, 2015

Yesterday's chili 

One's vulva or vagina

"I'm just going to go wait in Brian's office and warm up yesterday's chili for him."

Yesterday's chili by Taffy Esterhaus November 23, 2016

Yesterday's B.O. 

When a persons foul-smelling body odour (B.O.) has aquired a stale musk, as if the person has smelled bad for a considerable amount of time and/or hasn't washed for several weeks.

Aw man, this alcoholic stinks like yesterday's B.O. It's making me gag.

Yesterday's B.O. by lauren's awesome words May 17, 2011

Drop Yesterday’s Lunch 

To take a big old shit.

I’ll be right back, gotta drop yesterday’s lunch.

Drop Yesterday’s Lunch by Dick Onchin November 27, 2020

Yesterday's Jam 

A term used to describe people who are ignored and forgotten right after they are no longer needed.

Moss: They toss us away like Yesterday's Jam!

Roy: Yes! Yesterday's Jam! That is what we are to them! Actually, you know what that doesn't really work as a thing because jam lasts for ages.

Yesterday's Jam by BrompusWompus May 3, 2023

Yesterday's Fish Sticks 

not hip anymore, but once was so. once..

man, the Beatles are said to be yesterday's fish sticks.. I cut my dick and wear it on me neck if dat's troo!

Yesterday's Fish Sticks by hytham_hammer October 29, 2006

Yesterday's Patchwork 

Something that happened the day before you don't want to discuss. Usually used ironically.

Person 1: Hey, do you remember when you..........
Person 2: THAT WAS YESTERDAY'S PATCHWORK!!

Yesterday's Patchwork by Pie In Box November 30, 2019