[yes-man] {n.}, {informal} A person who tries to be liked by […]

[you bet] or [you bet your boots] or [you bet your […]

[you don't say] {interj.}, {informal} - Used to show surprise at […]

[you're telling me] {interj.}, {informal} Used to show that a thing […]

[yum-yum] {interj.}, {informal} - Used usually by or to children, to […]