"oi cunt!" Johnny shouted to his mate Screwy who was on the other end of the piss-trough
2. To get someones attention and direct it 2 somewhwere else.
"oi cunt.." Johnny wispered to Screwy, eye signalling in the direction of the chooney thats about to walk past the new high-tech-see-thru-glass piss trough
"oi cunt.." said Johnny pointing to his oblivious mate,Screwy, whose foot was now in the piss trough
3. To draw attention to the seriousness nature of a conversation and project authority. generally in a 'speaking down to them' manner, esp. used after been spoken down to yourslef
taxi driver: "ure still 30 cents short"
old racist man: "oi cunt..i used 2 break little peoples legs like yours bak in 'nam u fucken slopey
taxi driver: "go fuck yourself, fucken..ill fuck you up. wheres my fucken 30 cents?!?
Random cunt at the pub pointing to Robbo: "Whose this cunt?"
Robbo: "Oi cunt, call me a cunt again and ill fuck your arsetill my cock falls off