Have seen many idols wear this shirt but what is it supposed to be?

I honestly have no clue.

aespa's stylist loves to sabotage Karina and Giselle from what I noticed. both never had flattering outfits matching their proportions, not to mention that Karina since Next Level era stuck to straight hair. they have to quit this job, Karina's dress would look good if they cut off that strange rag or curtain and fitted the dress to her waist. she would slay actually.

spray paint of dog with tag effect

Something that a stylist working for SME likes probably.