Noun
(uncountable, countable, music) An exercise where the pupil is instructed to repeat a previously played rhythm by clapping.
(countable, originally African-American Vernacular, informal) A witty or sarcastic retort.
Source: en.wiktionary.orgIt didn't take long for Joe to come with a clapback. Source: Internet
It didn't take long for Natalie to catch wind of Joe's derogatory remarks about her and launched her clapback at him. Source: Internet
It didn’t take long for Taylor to fire back, who called his clapback “cute.” Source: Internet
Kuya Kim showed a ‘classy’ clapback to a non-supporter of ABS-CBN. Source: Internet