1) something/someone thats boring or irrelevant
2) something/someone you could care less about
3) something that's a waste of time
Ex.
1. Dom: how was the midterm?
Manny: it was a dub, they shoulda just did regular class.
2. Dom: do you remember what the morning announcements said about the assembly?
Manny: the morning announcements are a dub, I rarely pay attention to them
3. Dom: what's up with that kid Jean?
Manny: he's a dub, I don't talk to him
Retarded way of saying "W" which in context would mean "Win" because we have become so lazy that we are simplifying a single fucking letter.
Retard- I just took the dub in fortnite.*dabs*
Me- I'm gonna go shoot myself .
Retard- SHUT THE FUCK UP I'M PLAYING FORTNITE!
A dub is a person who will talk to you and be buddy buddy but then switch up on you and ghost you the next day.
Jon: Man, Samantha hasn't texted me back all day.
Keith: I been telling you she was a dub, man.