y'all'dn't've 

You all wouldn't have.

I swear to god, y'all'dn't've gotten laid if I didn't pay them, bro.

y'all'dn't've by marty000123 July 5, 2017

y’all’dn’t’ve 

you all could not have

y’all’dn’t’ve been this swag if you were half as iconic as me, sis.

y’all’dn’t’ve by peppa towel hearteyes September 23, 2019

y'all'd'nt've 

A quadruple contraction.

Means: You all did not have

Person 1: We went skiing!
Person 2: Y'all'd'nt've went without me.

y'all'd'nt've by Enzal1a December 14, 2023

y'all'dn't've'n'a

"y'all'dn't've'n'a" is a shortened way of saying "You all did not have a" which would be before something.

y'all'dn't've'n'a chance withought me

y'all'dn't've'n'a by ur legal step-father April 12, 2026

Y'all's'ndt'h've 

Short version of you all shouldnt have said by a heavily accented person and/or keith kogane from voltron or aph sweden

(After lance messed up) keith: y'all's'ndt'h've done that LANCE

Y'all's'ndt'h've by RedMeph127 March 20, 2017

Doctor Whomst'd've's'nd't'y'all 

It's like Doctor Who, but for really smart people. Plus, it will extend your brain to the point where you'll become the universe

Person 1: Do you watch Doctor Who? I love that show!
Person 2: Nah m8, that show is for dumbasses like you. I watch Doctor Whomst'd've's'nd't'y'all, and that is THE SHIT!
Person 1: What the fuck

Doctor Whomst'd've's'nd't'y'all by Trump's real news February 28, 2017

y'all'd'ven't 

The contraction of "you all would have not". Most commonly said by Southerns and memers alike.

Y'all'd'ven't done that if ya knew I'd find y'all.

y'all'd'ven't by Metaman39 March 20, 2017