I think it's just for fun

You're not a disgrace.

Yeah I tend to laugh at them, but how does one roll? And there has to be a gneral use for them besides making me laugh.

Rolling =
*roll picture* for obviously a picture.
*roll comment* for obviously a comment.
*roll user* for obviously a user.
*roll #* # being the amount of digits the number has.

I'm not sure if they have any other use.

So I simply type one of those commands and get the output?
What about dubs?

Yes you do. It has to be at the start of a sentence and don't forget the asterisks.

Dubs is luck really. You do *roll 2* to roll a 2 digit number and you might get dubs.
Trips is luck also. You do *roll 3* to roll a 3 digit number and you might be trips.
Quads is *roll 4*
etc etc....

you've been quite helpful. I thank you for this. Usually I get made fun of or thumbed down for not knowing this kind of stuff.

No need to thank me. Just being a helpful person. A lot of judgmental people on Funnyjunk I'm afraid.