can i shag ur nan 

To place your hand upon one’s head to shag them and it is a symbol of honor.

can i shag ur nan, i would be very honored if you allowed me to.

can i shag ur nan by I will shag ur nan May 10, 2019

Quick shag 

A short time period when a male has sex with a female for enjoyment and pleasure

I had a quick shag with a girl the other night

Quick shag by Quick shag May 6, 2018

Power shag 

During sex the man finishes as quickly as humanly possible, pulls his trousers up, pats the girl twice on the forehead in a patronising manor and leaves

Alright lads, if anyone pulls tonight they have to "power shag"

Power shag by LE FRUITCAKE October 13, 2011

Naked Shag Rug 

A rug, preferably from the 1970s, which is shaggy and used primarily for shagging shaggy women.

Paul: "Oh man, this playroom is so well furnished."
Francisco: "Oh, I know. Mostly because of the naked shag rug."

Naked Shag Rug by flippedegg July 25, 2019

we're not here to shag spiders 

Australian expression meaning "we're not here to fuck around", "Get your arse in gear", "get a move on", "let's get on with it", etc

Usually required when someone is Dragging the Chain and making the rest of the group wait until they're done fucking around.

Has the added bonus of shock value, if used in the right (inappropriate) company.

Come on mate, get your arse into gear, we're not here to shag spiders!

we're not here to shag spiders by AussieCol September 22, 2017

donkey shag 

Phoebe Buckley is a smokin' blonde with tiny ears and tiny feet. Therefore, we would refer to her as a "donkey shag."

Aisha, on the other hand, is sket.

bre phoebe is a donkey shag

donkey shag by George Gottlieby October 17, 2008

dial-a-shag 

Phoning up a Fuck buddy after a night out because you didn't pull and want to get your hole

Scott: "I see graham pulled last night"
James: "No he didn't. That was his dail-a-shag"

dial-a-shag by The Man That Be Big September 3, 2005