one who only needs one sip of water to cure his cottonmouth from smoking marijuana. often the envy of his peers, the one sipper is also usually the life of the party.
Jim: "Hey John, is your throat dry? IM SOOO HIGHHH"
Oneshipper is a term that refers when someone ships a singular ship while their stay in a fandom, and has/shows some kind of "loyalty" to it. They are the reason of the so called "ship wars" inside fandoms, and may or not be obsessive when it comes to their "OTP".
"This new ship is quite cool!"
"Yeah, but I can'tlike it. Im loyal to my ship."
"You're such a oneshipper."