Y'day 

Shorthand for time efficiency when writing, typing or texting yesterday.

I had a great time at dinner y'day.

Y'day by zopdeep August 27, 2021

Y-day 

Yesterday

What did you do y-day?

Y-day by -__-__-__-__-__-__-__-__-__- August 28, 2009

Only on days of the week that end in “y”.

Only on days of the week that end in “y”… a saying that just actually means “every frikin’ day”.

Example #1

Question: Do you drink often?

Answer: Only on days of the week that end in “y”.

Example #2

Question: Do you use drugs?
Answer: Only on days of the week that end in “y”.

Only on days of the week that end in “y”. by Mind Hunter the Profiler February 25, 2023

yday

the short way of saying yesterday
usually used in chat rooms such as msn

person1 : dude did you see how mashed i was yday

person2: yeh lol yday was jokes

yday by gangster67 July 30, 2006