When you get a incredibly rock hard
erection. Sometimes in the morning or when you’ve become turned on by something a bit
kinky like an older lady whose showing a lot of
cleavage.
Sometimes referred to as a ‘stonk on’
I’ve got a right stonker in my
underwear after seeing her milf tits
wobble in her low cut dress
I’ve got a stonk on and I
need to knock on out.