How do I bring my too-smart-for-his-own-britches down to my level?

I have a friend who I communicate with on Facebook, etc., who will routinely alienate everyone from a conversation by using highly technical terms and arguments, even in casual debates. Any suggestions with witty or equally logical responses that will make him recognize he needs to communicate in laymans terms... or at least something that someone without a doctorate degree would understand? [more inside]
posted by Unsomnambulist on Mar 7, 2013 - 48 answers