Doing a Johnra on it
Doing a Johra on it can refer to many things such as 1- Becoming laughably angry at his best mates over nothing 2- Drinking enough to kill oneself on one occasion but never again and resorting to a 2 cans max policy 3- Using unknown units of measurements e.g. 'a fuck mile' believed to be i the region between 30 metros and just over 4.6 miles.
'u drinkin tonite?' 'Ye 2 cans max and stop fucking going on about drinking you dickhead' 'alri relax don't start "Doing a johnra on it"