The act of spending one's time on Tumblr.
Not much just tumbling.
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.
Person 1: What is tumbling?
Person 2: Backhandsprings, cartwheels, roundoffs, tucks, fulls, doubles, ect...
Jewelery for your belly
Woah check out Hollie's tum-bling!
Person 1: Woah look at the ring in that belly!
Person 2: I know! Tun-bling or what!
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
The rumbling of one's tummy when one is hungery.
Robert: I haven't eaten anything since breakfast and I'm really tumbling. Listen to my stomach!
Billy: Yeah, I can hear your stomach from across the room!
The act of attempting to engage in sexual intercourse but being too drunk to insert your penis into the desired receptacle.
"I tried to fuck her last night but just ended up tumbling"