Im gonna go clog the toilet

The phrase you use when saying your off to take a piss with your mates making them believe that your going for a shit but in reality your just having a piss for comedic effect

You: Ight lad Im gonna go clog the toilet

Other person: Mate That’s grim why are you taking a shit in school

You: don’t worry it’s only a piss and a few rolls of bog roll