Green’s Dictionary of Slang

(orig. US campus) a female student who is not necessarily a lesbian, but who experiments with feminism and lesbian politics and culture; thus var. b.u.g., bisexual until graduation.

1993		N.Y. Times 5 June n.p.: There is even a new term—‘lugs,’ lesbians until graduation [HDAS].
1999		Flagpole Mag. Online 25 Aug. 🌐 ‘Confessions of a L.U.G.’ [...] I wasn’t a L.U.G. in the strictest sense of the word; I never gave up men entirely. Call me a B.U.G. (bisexual until graduation).
2003		newyorkmetro.com 🌐 13 Feb. Though Anne Heche is the most prominent example, many hasbians (sometimes called LUGS: lesbians until graduation) are by-products of nineties liberal-arts educations.