Sour - tard is derived from a sour retard
Only hardcores are allowed to use this word
Boy: Hey, did you see that youtube channel, sourtard?
Girl: Yeah, it's awesome, I think everyone should check it out at youtube and search "sourtard"
Boy: There hardcore at life and everything in it
Faggot: Are you hardcore?
Not a faggot: Even better, I'm sourtard
Faggot: What is that?
Not a faggot: Something you will never achieve!