Noun: "(fandom slang) in omegaverse fiction, the intense biological urge of an alpha to mate, typically triggered by proximity to an omega in heat"edit
2017, Marianne Gunderson, "What is an omega?: Rewriting sex and gender in omegaverse fanfiction", thesis submitted to the University of Oslo, page 36:
Proximity to an omega in heat can sometimes cause alphas go into rut, an aggressive need for sexual intercourse usually triggered by the scent of an omega in heat.
2019, Tessa Barone, "Just Go Find Yourself a Nice Alpha: Gender and Consent in Supernatural Fandom's Alpha/Beta/Omega Universe", thesis submitted to Oregon State University, page 34:
All the characters in this story pressure Dean to help Castiel through his rut, and clearly consider Dean’s resistance to be immature and an overreaction.
2019, Chris van der Vegt, "The Second Genders: Utopia and Dystopia in Stranger Things Omegaverse Fanfiction", thesis submitted to Utrecht University, page 23:
Early in Wicked Game, Steve goes into his first-ever rut.
2021, Rachel Joy Seifrit, "Come Out, Come Out, Wherever You Are: Sexuality and Gender Exploration in Contemporary Slash Fanfiction", thesis submitted to Kutztown University, page 45:
In some cases, being in close proximity to their fated pair can cause an omega to go into heat, or make an alpha go into rut.