When you accidentally flip the beginning or ending sounds of two words when speaking, that's a Spoonerism. – Photo credit: Bain News Service/Wikimedia Commons & Leslie Ward/Wikimedia Commons
Linguists break down why so many people say "is is." – Photo credit: Canva, Africa images (left, cropped) / Khosro (right, cropped) / SkaHero42 from pixabay (text box)