There was Simpsons underwear, a My Little Pony–inspired dress, and a frock made out of rainbow horsehair.
Only at the Eurovision Song Contest in 2014 could a guy with a beard wearing a frock cause such ructions.
Yet the only frock that matters—sorry, fashion purists—is lot number 293, the very last in the sale.
mid-14c., from Old French froc "a monk's habit" (12c.), of unknown origin; perhaps from Frankish *hrok or some other Germanic source (cf. Old High German hroc "mantle, coat;" Old Norse rokkr, Old English rocc, Old Frisian rokk, German Rock "coat"), from PIE root *rug- "to spin."
Another theory traces it to Medieval Latin floccus, from Latin floccus "flock of wool." Meaning "outer garment for women or children" is from 1530s. Frock-coat attested by 1823.