[you can't teach an old dog new tricks] It is very […]

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

[you said it] or [you can say that again] {interj.}, {slang} […]

[you tell 'em] {interj.}, {slang} - Used to agree with or […]

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

[your] See: [HANG ON TO YOUR HAT] or [HOLD ON TO […]

[yours truly] {adv. phr.} 1. Signing off at the end of […]

[yr] "Your" or "you're"

[YS] "You suck"

[YSSIA] "Your spelling says it all!"