A very lethargic being that lacks the motivation to move and live. These slow moving organisms remains lifeless most of their days in a coma like stage except during times of feeding and asexual acts. Such a beast often has poor hygiene and is quite un-kept. The lack-luster look of the animal in question gives it the appearance of shit. Failure of possessing personality and charm prevents it from breeding, hence the need for rampant foul sexual on itself. The ability to comprehend simple commands is nullified due to the brain conserving its resources for respiratory purposes.
After a night of drinking...
"Man, I feel like gruba this morning!"
An individual that has their entire adult life given to them with a silver spoon without really ever working for it, and then proceeds to gloat and remind everyone of their shortcomings...all the while remaining totally ignorant to the hypocrisy of what comes out of its mouth.
"I wish my mom bought me a house so I can act like a gruba and tell people I'm more successful than you."