grannyshagger 

a person who prefers the sexual company of the elderly or those of the same sex.

Quentin: Jon seems to be getting onn very well with your nan.
Jeeves: They've been at it for 3 days now. He's a right grannyshagger.

grannyshagger by narch12 December 7, 2006

Granny-Shagger 

British term for a young man who likes to have sex with older women. Usually a woman old enough to be his Mother or Grandmother.

"Jeremy, you're 19, and you're girlfriend is 52. You are nothing but a granny-shagger."

Granny-Shagger by Terrific2 May 9, 2018

unstoppable granny shagger 

An unstoppable granny shagger is someone who likes sex with women so much that he would go so far as to having sex with lots of grannies or grandmas, in order to fulfill his sexual needs.

Mate, you are an unstoppable granny shagger. WTF

unstoppable granny shagger by Londonerwithsparetime May 17, 2017