present participle of tumble to

plural of tumbi

(gymnastics) A padded mat used in gymnastics.

plural of tumbling mat

plural of Tumblrina

(derogatory, Internet slang, neologism) A female user of the Tumblr microblogging service, typically stereotyped as a social justice warrior.

plural of tumbling mill

plural of tumbleweed moment

Marked or characterised by tumbling

A surname.