To roll over, or to and fro; to throw one's self about; as, a person on pain tumbles and tosses.
To roll down; to fall suddenly and violently; to be precipitated; as, to tumble from a scaffold.
To play tricks by various movements and contortions of the body; to perform the feats of an acrobat.
To turn over; to turn or throw about, as for examination or search; to roll or move in a rough, coarse, or unceremonious manner; to throw down or headlong; to precipitate; -- sometimes with over, about, etc.; as, to tumble books or papers.
Do the one thing you think you cannot do. Fail at it. Try again. Do better the second time. The only people who never tumble are those who never mount the high wire. This is your moment. Own it. Oprah Winfrey
Skateboarding teaches you how to take a fall properly. If you try to kickflip down some stairs, it might take you thirty tries - and you just learn how to take a tumble out of it without getting hurt. Bam Margera
The hardest tumble a man can make is to fall over his own bluff. Ambrose Bierce
Don't learn to do, but learn in doing. Let your falls not be on a prepared ground, but let them be bona fide falls in the rough and tumble of the world. Samuel Butler
If his presidency is to represent the full power of the idea that black Americans are just like everyone else - fully human and fully capable of intellect, courage and patriotism - then Barack Obama has to be subject to the same rough and tumble of political criticism experienced by his predecessors. Juan Williams