When two people mess around on a bed or couch by tickling, poking, pinching, or any manner of playful physical contact in a loving, fun manner.
"So what do you want to do tonight honey?"

"Watch some TV and go to bed, probably."

"Nooo! Why don't we play some cards or *tumble around for a while!"

"Alrighty then, tumbling it is!"

*Alternate forms of Tumbling can be used openly
by LaNeesh January 24, 2010
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A person who can flip; like in cheerleading. AKA backhandsprings, tucks, layouts, fulls; etc.
Robby goes to tumbling every Tuesday, he is not good at all.

HAHA
by Kuhn Dawg. March 11, 2008
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Flipping upside down... Boys and girls tumble just for fun. People also tumble in sports such as cheerleading, gymnastics and power tumbling.
Person 1: What is tumbling?
Person 2: Backhandsprings, cartwheels, roundoffs, tucks, fulls, doubles, ect...
by The tumbler June 1, 2012
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Person 1: I want to Tumbl today.

Person 2: Me too. I love Tumbling.
by NachoKitten December 26, 2011
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