The relationship between two people who are not dating and have no stated boundaries, but are more to each other than just a booty-call.
Mara: "Chelsea, are you and DB still hooking up with each other or have you two finally decided to make it official"

Chelsea: "No way...we will never be official! We are just two friends who enjoy each other both with and without our clothes on."

Mara: "Oh word ... so you two are just "Less Than Casual"!
by M-Swiss December 29, 2010
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