A slang word for sensimilia. Sensimilia is spanish for high quality female cannabis that have not been fertilized by male cannabis plants, making the buds seedless and very potent with THC. A.K.A. Chronic, good shit, da bomb-diggity, or sticky-icky.
"Though I don't know why I chose to smoke sess, I guess that's the time when I'm not depressed"- Inspector Deck of the Wu-Tang Clan as heard in the song C.R.E.A.M. off the album Enter The Wu-Tang 36 Chambers