To travel without a set course or time frame, more emphasis is placed on the journey, hanging out with people you meet and exploring diversions along the way. The original intended destination may not even be reached and possibly forgotten about along the way.
A form of guitar or bass improvisation that relies heavily on the the thumb on the rythmic hand.
I have the summer off so I'm gonna thumbdrift europe on the train.
That dreamer yasmin just thumbdrifts through life with his head in the clouds.
"What did you just play?"
"I' don't know, I was just thumbdrifting."
"the next one goes B, Cm, G and then thumbdrift the transition"