The level of jizz in the male sexual organs, for example if you haven't had a wank for a week you have a healthy wank balance, if you wank 8 times a day then your overdrawn
I need to refuel the tank - my wank balance is running low after this mornings work out
Public House, Boozer, Bar etc.
Apparently this term has origins in the St Albans area of hertfordshire
"What time you heading down the juice tank?"
"Im in the juice tank"