混まぜ返かえす

1. 1to stir well ; to mix thoroughly Translated by Jiyomi
2. 2to interrupt (with a joke, sarcastic remark, etc.) ; to butt in (with a facetious comment) ; to make fun of (what someone says) ; to banter ; to jeer

Other writings and readings

JMdict entry 1641180. Source and licence.