what you say when someone does something which 1) you dont want them to do, 2) they're being a faggot, 3) they are sinking your bevans, 4) they are tuning your girlfriend, and pretty much in any occasion and it would be considered "a good call" by lads around.
dude picks up your sandwhich and throws it ont he ground.
"truu you dooo do that"
or a different version, someone tries to make a good call such as a mum joke, your frined says a mum joke to your mum,
"hey mrs bob, your a slut whore cause your bob's mum, haahah"
bob: "truu you doooo say that.."