permatannoun [ C ]
uk/ˈpɜː.mə.tæn//ˈpɝː.mə.tæn/humorousa tan (= brown skin colour caused by the sun) that someone has all the time, especially one that does not come from being in the sun but from a beauty product, a sunlamp, etc.:
He tries to divert attention from his receding hairline with a permatan that surely comes from a lamp or a bottle.