  1st one depends on where the emphasis in your accent is...gentle it means "what the hell"...if you emphasise (phonetically) the "ooooo" bit at the end it become more like "what the fuck" The second one is to commit severe "cunning linguist" on the mother "bitch" of your target. By severe I mean getting the head down there and causing nastiness to come out. Kani-Nabu-Chao-Chi-Bei is a phonetic equivalent of that in Chinese. All though this one is for doing bad things to the dead relatives of your target...(cue: some tiresome jokes from fonz! ) 
