yank (1): bother; harass.
"Stop yanking me, okay?"
Yank (2): a Yankee; an American.
"Dave is a Yank."
a yes-man: someone who tries to get approval by agreeing with everyone.
A: "Why does the boss think Arnold is so intelligent?"
B: "Because Arnold is a yes-man. He agrees with everything the boss
says!"
You don't say!: Really? / Is that really true?
A: "Have you heard the news? Jessica got married!"
B: "You don't say!"
You've got to be kidding!: You can't be serious! (What you