In toddler-speak, words may be known but mispronounced. Language acquisition is like that; vocabulary develops before pronunciation, totally normal. Occasionally there are some unfortunate (or fortunately hilarious) versions of common words.
Sam has a couple raunchy ones:
Talking about tunnels (one of his Favorite Things) sounds like: P*rno! P*rno!
Giving kisses, which he does often: Piss! Piss Mommy!
And some very sweet phrases:
Happy tee you! Happy tee you Mommy! Happy happy tee you Daddy!
Tank you bay much!
And a song:
Row row boat peet may may by beam (often while running circles around the couch).