Dongdong, cheerleading mascot of 2008 Beijing Olympics

(onom.) thud; thumping; thudding; pounding

(onom.) ding dong; jingling of bells; clanking sound

splash; (onom.) for heavy things falling down

(slang) to kabedon; to corner (sb in whom one has a romantic interest) against a wall (loanword from Japanese 壁ドン "kabedon")