Whatchutalkinboutchris...?

“Spoonerisms” are words or phrases where the order of the sounds is mixed up, such as flutterby for butterfly and ossifer for officer. They're called spoonerisms after Reverend William Archibald Spooner, who lived in Oxford in the late 1800s and early 1900s and who was reported to rampantly make these slips of the tongue. There are unintentional spoonerisms that don't make sense, such as cimmanon and goys and birls (for cinnamon and boys and girls), and then there are spoonerisms that create new, amusing meanings such as keys and parrots (for peas and carrots) and better Nate than lever (for better late than never). (courtesy of Grammar Girl)

Thanks Kev.