Bossk, a Trandoshan, started his life by devouring his siblings before they hatched, something that made his father infinitely proud.
Bossk was present at Jabba's Palace when Boushh brought Chewbacca in to collect the bounty on the Wookie's head. It turned out to be a ruse, and Bossk was more than happy to accompany Jabba's court to the Sarlacc pit and watch Chewbacca and his friends be executed. It is unknown if he survived the explosion killing most on board the Sail Barge at the Skirmish at Carkoon.
Bossk was one of the six bounty hunters Darth Vader sent for when hunting for the Millenium Falcon in the asteroid field. He even teamed up with a young woman bounty hunter and a Wookie, against his better judgement, in order to capture Solo and his copilot. They claimed to have information that could lead to Bossk capturing hundreds of Wookies, but instead they trapped him in a meat locker and used his ship to rescue these wookies and deliver them to the Rebel Alliance. Bossk was then delivered to an Imperial outpost and turned in for the false allegations of illegal Wookie pelting. Bossk was able to escape.
At some point during his life, Bossk was known affectionately as "Bossky." He owned a ditch of which he was immensely proud, even going so far as to have Luke arrested and imprisoned for "putting dirt in Bossky's ditch."