Definition of heathers:
(N) :
a 1988 American teen black comedy film written by Daniel Waters and directed by Michael Lehmann, in both of their respective film debuts.
(N) :
an indie pop act formed in 2007 in Dublin, Ireland by twin sisters Ellie and Louise Macnamara.
(N) :
an American black comedy television series, created by Jason Micallef, that premiered on October 25, 2018, on Paramount Network.