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1.
Insulting term for a hick or redneck. Implies they breed within their family tree, or "jump the stump". Often used by other hicks/rednecks, to mark one as the lowest of the low.
Jethro's a filthy stump jumper.
by GAW II May 25, 2008
 
2.
In old Colonial south, Alabama, Mississippi, Georgia and other states where female Mules and Mare's were used for field work the young men tending these farm animals would often find a suitable height stump around the edge of the field they were working and back the animal up to their penis and give it a good flogging. These young men far removed from female companionship would take large melons and gourds from the field and cut a small hole in the vegetable into which they would insert their penis and have sex with the still sun warmed vegetable.
Ole Jimmy, Hell that boy is a stumpjumper. His momma caught the old mare backed up to him last week when the morning fog suddenly lifted off of the bean field.

You show dont want to eat no watermelons that Bobby Lee offers you. His daddy caught him up in the hay loft with a big ole striped watermelon the other day, he was laying into that poor old watermelon like a damn buck rabbit on a doe, Pluck! Went his dingus when his daddy started screaming!
by Tractorshaft August 09, 2007
 
3.
Refers to a type/sub-brand of mountain bike.

The Stumpjumper was one of the earliest bona fide production mountain bikes —- a fact Specialized is trumpeting as the Stumpjumper turns 25 years old in 2006. The first two mass produced mountain bikes were sold in 1982: the Specialized Stumpjumper and Univega Alpina Pro. The word is actually "stumpjumper" instead of "stump jumper."

by PaulaForUrban December 03, 2007
 
4.
An overly promiscuous or in some other way, sexually indiscrimenant man. (comes from the old saying 'he don't care he'd f_@& that stump if he knew there were no bees in it)
That stump jumper is so horny he'd fu___ a pile a rocks as long as he knew there wasn't a snake in it
by MikeeJay63 February 16, 2010
 
5.
Refers to the logging industry, when the workers machine is moving at a high rate of speed, he is jumping stumps. Or if working on the ground a productive employee jumps the stumps rather than walking around. Indicates a highly productive worker.
by stumpjumper June 22, 2009
 
6.
One who brags to his friends about the number of women he has had anal sex with.
The chicks at that bar found out he was a stumpjumper and would never go home with him.
by Dutchman March 07, 2003
 
7.
Person of african american decent. Also see moon cricket
Damn stump jumper stole my tv!
by GG January 24, 2004