Summer in the South

Back a couple of decades ago, few people anchored their swing sets into the ground. This would result in the legs of the swing set actually leaving the ground if you swung too high. These days parents are more aware of the dangers of unanchored swing sets; so you are no longer likely to hear somebody say, “Don’t swing too high or you’ll

tump over."
v. Chiefly Southern U.S., tumped, tump·ing, tumps.

v.tr. To overturn. Often used with over: You're about to tump that thing over.

v.intr. To fall over. Often used with over: Is that wheelbarrow going to tump over?
[Probably akin to TUMBLE.]

"tump." The American Heritage® Dictionary of the English Language, Fourth Edition. Houghton Mifflin Company, 2004. Answers.com 08 . 2006. http://www.answers.com/topic/tump