A Selfdude is someone that has been repeatedly rejected by the world, and yet continues to kick ass. Often used in the 1st person perspective.
Also, can be used as an expletive.
Roberto- Did you hear back from Harvard?
Mike- Yeah.... I didn't get in.
Roberto- That sucks, man.
Mike- I thought I was selected... Selfdude rejected!
A subtard is like a leotard, but you wear it on your head.
Can also be used as an adjective to mean above-average.
"Will, we're gonna be so late. Just grab your subtard and let's go!"
"Wow, that was a real subtard performace, Mary. Way to go!"