Redwings

[Sarah]

eating a girl out in her period

[Rihanna]

(1) [The status] earned by one who has completed the act of cunnilingus upon a [menstruating] woman; (2) [the status] conferred by a menstruating woman upon a sexual partner who has performed cunnilingus upon her; (3) the appearance resembling that of a [small birds] wings given by the wearing of menstrual blood upon the lips and face of one who has just completed the performance of cunnilingus upon a menstruating woman, considered to be evidence of having performed a sexual act of an extreme intimate nature.

[Vania]

To eat a [chic] out when [shes on] her [period]

[Monty]

when a dude has [sex] with a [chick] on her [period]