Something that is better than fun. It's funner.
Jimmy: I'm just chilling
Samantha: Ooo fun
Jimmy: Now, I'm eating cereal
Samantha: Funner
plural: janx
definition: male version of treesh, some boy who acts brand new, hoes around and treats you like shiit
Her: You heard what Manuel did at the party?
Me: Yeah he and his boys are janx
Marisa: Ooo who is the new boy?
George: Yeah but he a jank