Dictionary

tribbing en · NOUN

From tribadism (+ -ing).

(rare, slang, uncountable) Vulva-to-vulva sexual intercourse with legs intertwined.
- She loved tribbing and knew that this was going to be a great experience. 2011, Reggie Chesterfield, Hot and Dirty Wives, page 41:
- Ninety minutes earlier, Vicki was sprawled in bed, lips dry, nipples sore, and chest still heaving after an hour of kissing, fondling, tribbing, tonguing, and the commission of other acts of passionate love-making. 2009, Herb Schultz, Architect's Rendition, page 150:
- This “All Teen Edition” is another tribute to “tribbing,” aka “hot lesbo scissor sex.” Naturally beautiful girls like Riley Reid and Raven Rockette play “scissor sister” until they both cream their panties. Katie St. Ives gobbles up Chrissy Nova, and Lia Lor gets lost in the muff of Chloe Foster. Tia Cyrus closes the film by tribbing out on Jodi Taylor's slippery vaggieburger. 2016 August, “5-Star Fuck Reviews”, in Club (Pornography), Paramus, NJ: Club Publications, Inc, →ISSN, →OCLC, page 69?:

From tribadism (+ -ing).

(form-of, gerund, participle, present) present participle and gerund of trib
form of trib