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1.
Noun. A label given to two persons whose spirits have joined together. An exclamation of unity.

Other forms:

asess
asesskins
sexykittens
sesskin
sass
sasskins
Word origin: Wisconsin, 1999. Two friends were tripping on mushrooms, and in the swirling light, saw the word twinkling in the air--out-of-doors
Our relationship has finally reached sesskins!
by asess February 24, 2012