The act of two men banging each other at the same time. Though improbable, two men are so horny that they face each other and attempt to nobly penetrate one another whilst circumventing each other's balls.
I'm so horny right now I have dusty balls . Let's bang each other at the same time.
How do we do that?
Easy bro, we'll just do a little scissor dicking.
Two women doing what's known as "scissoring", both either having a burning sensation STD or a UTI -OR- both must be two natural born red heads -OR- used accidentally, or otherwise, a lube causing a burning sensation, while said "scissoring" occurs.
"I was gonna make it a threesome, but I caught wind that their was a scissor fire burning." -OR-" I went to Ireland, expecting to see a scissor fire, but I came back disappointed" -OR-"I knew she was kinky, but I didn't expect her to turn it into a scissor fire."