This means big up the boys if you all in a crowd you all shout big up the massive and everyone knows that you have arrived to the party
by misterrrjosh November 18, 2019

by misterrrjosh October 11, 2021

in other words mattress back describes a fat person you can use it for all people like if they are skinny you would say you single matback and if they are fat you call them a double matback
Girrrrrrrrup big matback
by misterrrjosh November 03, 2019
