The instrument that no one cares/knows about.
Guy 1: Wow that guitar player is amazing!
Guy 2: Yeah, that bass player is pretty awesome too.
Guy 1: What's a bass? Isn't that some kind of fish?
Guy 2: .........
your fat sister who does nothing
but sit on the coach and eat all the food
and has the undying reek of a dead fish
Dude you've turned into a total bass.
You disgust me.
(english) and ass
a bastardization of those words, non-superlative version of "bad ass" as in
1) extremely good/pleasing
How was the show last night?
A four string guitar that is several octaves lower than a guitar. It is more commonly played with your fingers than a pick. Also, bassers (more commonly known as bassists) are usually the weird ones in the band.
They are also usually quieter and calmer than guitarists and drummers. And can therefore usually be pushed around more easily.
Guitarist Chick: Let me straighten your ridiculously curly hair!
Basser Dude: NO!
Guitarist Chick: Pleeeeease...
Basser Dude: Okay, fine.