Used to describe doing nothing or to indicate that a situation is over or a plan has been canceled. It conveys that something is no longer happening or is now irrelevant, similar to saying whatever or it is what it is.
A: Jesus, we are not going out today. B: Grasa then...
To slack off or stop working out of pure laziness. It refers to someone being totally unproductive and ignoring their duties. (The vulgar imagery implies a person is so idle that their testicles have grown heavy enough to be slung over their shoulder).
You just decided to echarse las bolas al hombro and didn't even finish the work for tomorrow!
A slang term used in the Venezuelan state of Zulia to describe someone who does absolutely nothing all day, a total lazy-ass. (In this region, 'er sevillo' is a vulgar intensifier used to emphasize how useless or annoying a person or thing is).
You know that vago er sevillo doesn't do a thing, so do me a favor and get him out of here.