Slag word meaning to be nice, or generous orginiated in Northern California in the early 2000's.
Hey, thanks for bieng such a jimmah, and giving me a ride.
by Zac Cirivello January 07, 2003
A word uncommonly used after the year 1864 to describe something which is unclean or cheap. Although rarely said anymore, the word is still in use in rural areas of Australia and New Zealand.
Your car is extremely jimmah.
by U.S. Census Bureau August 05, 2002