Supplementaration 

Adding to, Contributing

The supplementaration of water allowed him to get a high.

Supplementaration by DannyWB October 13, 2005

Supplementation Partner 

A sexual partner outside of your primary relationship in which the partner "supplements" what your main relationship is lacking in. The term is used as a less crass version of "fuck buddies" or "friends with benefits."

"My husband won't go down on me, but my supplementation partner sure does."

Supplementation Partner by CoffeeNapRepeat April 15, 2022