A guy and a girl that both really like each other, but aren't dating. They could be not aloud to or other circumstances. They do things like hug, hold hands, blow each other kisses, wink, etc.
They are usually bothered for not dating.
Ex. "Are you and Des dating? You guys are SOO cute. I saw you warming her hands and like hugging her."
"No, we're not. Why?
"You SOOO need to! Or are you guys like pseudating?"
"Go away and get out of my life."