Something that is (easily) breakable.
A set of customized hardware that is part of a drum kit. Breakables typically consist of: the drummer's cymbals including high-hats, the snare drum, the kick pedal and the drummer's stool.
Fragile.
Able to break or be broken.
Incapable of being overcome or surmounted.
Not usable as legal tender.
Incapable of being passed over, crossed, or negotiated.