A combination of the words "All," "of" and "That." Together they are pronounced "All of That," or a shorter version is just All that.

It is a word used to praise or compliment someone or something for being on top of his/her/its game.
Jerk #1: "Ey, check out that girl down the street. Man she's alladat!"

Jerk #2: "Yemen."
by Elmer May 30, 2005
Friend: can i smash your girl
You: alladat fam
by Jc2019 March 25, 2019
A jamaican word meaning all of that or all a dat
I want alladat girl
Jamaican: Mi want alladat innu mi gyalfren
by Khxng December 30, 2019