Green’s Dictionary of Slang

(US campus) parents.

1968		Current Sl. III:1 11: Rents, n. Parents.
1971		Current Sl. V:4 18: Rents, n. Parents.
1982		W. Safire What’s The Good Word? 302: Parents are ‘rents,’ reflecting a tendency to clip a syllable.
1984		Eble Campus Sl. Mar. 5: rental unit, rent – parents.
1987		Eble Campus Sl. Spring 8: units – parents.
1996		Eble Sl. and Sociability 92: The Coneheads sketches [...] contributed parental units for ‘parents’, from which developed units.
1997–2000		College Sl. Research Project (Cal. State Poly. Uni., Pomona) 🌐 Da ’rents (noun) Your parents or someone who likes to act like them. [Ibid.] Rentals (noun) Parents.
1997–2000		Da Bomb 🌐 23: Rents: Parents.
2001		Indep. Rev. 13 Dec. 2: The number of times I have been asked by the ‘rents’ (parents) what these groups are/mean and here it all is in one article.
2015		J. Stahl OG Dad 154: Back then the ’rents could simply reach in [to the cot] [...] and snatch young Tyler or Jessica without bulging a disc.
2017		hubpages.com ‘Roadman Slang 4 Jun. 🌐 Rents - parents.