Stupid af 

To be so fucking stupid

That kid is stupid af

Stupid af by Anon0906 August 28, 2016

Stupid Af 

some loser on the internet that reads and posts urban definitions for fun

Stupid Af: Hi I Am Stupid Af And Im A Loser Probably I Dont Know I Dont Care But Whatever.
Guy 1: Why Are You Typing Like This.

Stupid Af by Stupid Af July 18, 2021

stupid af 

short for "stupid as fuck". To be fucking stupid.

That guy is beyond ignorant, he is stupid af

stupid af by oshikureto July 5, 2022