Complete bollocks

Complete bollocks when somebody is chatting complete bollocks it means they are chatting rubbish chatting shit talking nonsense what they are saying has no substance to it and should be

Bobby: I'm the hardest bloke in the world nobody can take me.

Fred: I don't think so mate I think you're chatting complete bollocks remember you got knocked out that short skinny looking bloke last week for grabbing up his Mrs.