Spoonerism

Nolan: I found us a good sparking pot!

Neil: That’s a Spoonerism.

Nolan: What’s a Spoonerism?

Neil: It’s when you switch the first part of two words… there was this guy called Edward J Spooner or something (ed. note: William Archibald Spooner) who… now keep in mind, grandpa taught me this, so I’m not sure how true it is… but he used to do this a lot, so now they call it a Spoonerism.