A reference to the size of a female's ass. The size must be small enough to hold her ass in one hand. This type of ass is enjoyed by mostly white males, but there are a few exceptions among black males.
"Dude, that chick had a "onehand". Her ass was so small and tight I gripped it with one hand while I was munching away."
by Big Black and Nasty November 21, 2007
A self-purported "videogame" streamer that frequents sites like twitch. Streams are, in fact, essentially OnlyFans.
A: "Hey, i've been hearing a lot about this new streamer, is she any good?"
B: "Nah, man, she's a Onehand Streamer."
B: "Nah, man, she's a Onehand Streamer."
by King George the Minus 58th October 3, 2020