2) To be really drunk, derives from pot, the Australian slang for a beer glass.
3) To be fired from your job, possibly because of one on the two preceding definitions or maybe both.
4) British Army slang, to shoot and kill an enemy combatant, derives from the old hunter's expression 'one for the pot', referring to a rabbit, pigeon shot and killed.
5) Buried, derives from the slang for burying the victim of a hit, by extension it is applied to someone who has received a put down so vicious that they are figuratively dead and buried.
6) Fish, especially conger eel, cooked by simmering in vinegar with herbs and spices.
2) Bruce broke up with Sheila, so 'is mates took him down the pub an' got 'im potted.
3) Joe called his boss a wanker and got potted.
4) You know that sniper that's been giving us trouble, Jimmy's potted the bastard.
5) Did you hear what that bitch said to him? Man she totally potted him.
6) What's for tea? Potted conger? Great!
In other words: If you have been potted then you have in some way been insulted. This word works far better in a group of people as once one has been insulted another acquaintance (or if the group are close to you a 'friend) will turn round and yell in a teasing way 'POTTED'.
person 2: 'MATE, your mums sideburns disrespect me'
Group: 'BLADD, YOU JUST BEEN POTTED. INIT.'
person 4: Parred