Could also be shortened to gam-gam, or simply gam. Can be described in many ways; such as "prime gammon", "moist gammon", "stale gammon" etc.
Could be used for when talking about females in general.
Being "on the pull" could also be described as "on the prowl for some gammon"
"Yeah, but it was stale. Bad times"
"Shiiiiiiit! check out that prime gammon!"
"too right! I'm erect!"
"I haven't gotten my dick wet in ages, I fancy a bit of gam-gam on the go."
"Get out of my house"
"Any gammon coming to this party?"
"Nah mate, it's just a sausage-fest"