The story
From mall (“enclosed shopping centre”) + goth (“person who is part of the goth subculture”), suggesting that they purchase their clothes from mainstream retail outlets.
Etymology from Wiktionary, CC BY-SA 4.0.
mallgoth
mall·gothToday it means: Originally (derogatory), an inauthentic or trendy goth; now, a person who dresses in goth-inspired clothes, is interested in industrial metal and nu metal music instead of gothic rock, etc. Full definition →