Perezoso comes from clips associated with Aivy, also tagged online as AivyLovencraft, a VTuber creator whose short voice moments are often clipped for soundboards. The word itself is everyday Spanish for lazy and also the noun for a sloth, which gives the clip a double meaning that Spanish and English speakers both get quickly. Fans share brief VTuber reactions like this across streams, Discord servers and short edits, where a recognisable voice and a single expressive word can be reused in new contexts without explaining the original moment.