I saw a video on youtube of someone describing their drop shot knot, and he said he uses a half uni knot. Does anyone know what a half uni knot is?

I can't remember which channel posted it, and googling it isn't helping much.

I use a single uni knot to rig my drop shot.

Just have to pass the tag end back  through the hook eye to attach the weight.

I suppose it's half a double uni knot. 

A-Jay