tumble
     n 1: an acrobatic feat of rolling or turning end over end
     2: a sudden drop from an upright position; "he had a nasty
        spill on the ice" [syn: {spill}, {fall}]
     v 1: fall down, as if collapsing; "The tower of the World Trade
          Center tumbled after the plane hit it" [syn: {topple}]
     2: cause to topple or tumble by pushing [syn: {topple}, {tip}]
     3: roll over and over, back and forth
     4: fly around; "The clothes tumbled in the dryer";  "rising
        smoke whirled in the air" [syn: {whirl}, {whirl around}]
     5: fall apart; "the building crimbled after the explosion";
        "Negociations broke down" [syn: {crumble}, {crumple}, {break
        down}, {collapse}]
     6: throw together in a confused mass; "They tumbled the teams
        with no apparent pattern"
     7: understand, usually after some initial difficulty; "She
        didn't know what her classmates were plotting but finally
        caught on" [syn: {catch on}, {get wise}, {get onto}, {latch
        on}, {cotton on}, {twig}, {get it}]
     8: fall suddenly and sharply; "Prices tumbled after the
        devaluation of the currency"
     9: put clothes in a tumbling barrel, where they are whirled
        about in hot air, usually with the purpose of drying;
        "Wash in warm water and tumble dry"
     10: suffer a sudden downfall, overthrow, or defeat
     11: do gymnastics, roll and turn skillfully
Source: WordNet® 2.0