Grambling is a slang term whose exact origins are unknown but is generally thought to have originated in California as a combination of "gambling" and "rambling". It can describe living an unconventional, adventurous and sometimes risky lifestyle associated with traveling, independence, playing music, and having fun, and can be a catchall synonym for any and all of these activities. Gramblers are spirited and fun-loving, rough around the edges, and tend to disregard societal norms in favor of a good time.
"We had a bunch of gramblers sitting around the campfire last night. Must have grambled twenty songs. It was a Gramble for sure."