Just like "That's what she said"
When something is not meant to be sexual, but sounds sexual or can be put in to a sexual context.
The origin of the word comes from the TV show "Glee" where it is typically said as a sort of catchphrase by character Santana Lopez.
(taken from show)
"Well you guys have a hole to fill, and I'm just trying to fill it."
"..Wanky"
the act of true love and admiration of a discreet few in society, followed by hot sex
The act of shitting qand Masturbating at the same time.
Bro didn’t have enough time before work us the throne and bust one out, so he did w stanky wanky and got both out of the bed way at once.
Some loud pack of that za!! It stank so good and so strong and it leaves you super high and super coughy
I’m smoking on some stanky wanky; it made me start crying
A fat lard. Aka jabba the hut looking head ass mug lol
Your a stupid ookie wankie