the red hand 

Start off finger blasting then go knuckles deep until you split the bitch

Guy 1: Bro did that bitch give you the red hand last night?

Guy 2: Yeah right after I dirty deaned her

the red hand by Dasmil 1041 March 20, 2017

The red hand of Ulster 

This, rather crudely, is what happens when you masturbate a woman who is menstruating. I first heard it in Northern Ireland, which, I imagine, is its obvious place of origin and relates to the Ulster flag.

'Don't go there!'
'Why?'
'You'll get the red hand of ulster!'

The red hand of Ulster by Jimmybobby123 November 30, 2007

The Red Hand of Sauromon 

When your partner is menstruating and you slide your hand across the blood to cover your entire hand. Once covered in blood, you stamp your paw print on her mug and exclaim, The Red Hand of Sauromon!

"Okay so here I am wrecking Éowyn's guts when I notice she is on her period so I slapped her with the Red Hand of Sauromon."

The Red Hand of Sauromon by PharoahBoyKing311 June 6, 2022