Pronounciation: ah-kwa-sex or ah-kwuh-sex

Root: from the words "aqua," more commonly known as "water," and "sex," in the most plain form of the word, meaning "intercourse."

Meaning: When two or more individuals engage in dry humping while in, or under water. Due to their presence in water, the dry humping is no longer dry, therefore it needs a new term, and that being: aquasex.