Dothing
Pronounced doth-ing, it describes the act of attempting to convince others of a thought or feeling you have that actually, correctly or incorrectly, makes them think the exact opposite is true because you are incessently carrying on and on like an idiot. Taken from the the quotation "The lady doth protest too much, me thinks" from William Shakespeare's play Hamlet.
Her: Do you like my dress?
Me: Do I like it? No, I LOVE it! I love the color! I love the form! That's the best looking dress I've ever seen! Damn, that dress is awesome!

Her: You're dothing again, I can tell. So you hate it?

proclaim expression deceive