cha-cha-cha
noun [ C ] uk/ˌtʃɑː.tʃɑːˈtʃɑː/ us/ˌtʃɑː.tʃɑːˈtʃɑː/ (also cha-cha, uk/ˈtʃɑː.tʃɑː/ /ˈtʃɑː.tʃɑː/)
恰恰舞（曲）
an energetic modern dance, originally from South America, involving small fast steps and movement of the bottom from side to side, or a piece of music written for this dance