Something that “hums” is simply something that sucks or that is bad. “Hums” can be used to describe any noun.
Used for people named Jason that cant shut the fuck up.
Some random person named jason: Hi!
Person 2: Shut the fuck up you hum.
When something or someone stank
Guy: *Farts*
Me:HUM!
Guy: what?
Me: YOU STANK!
Meaning go. Cheering for your team.
Oh the Red Devils lost? Well yeah… Hum Bruins.