Y

[your]

See:

[HANG ON TO YOUR HAT] or [HOLD ON TO YOUR HAT] or [HOLD YOUR HAT],

[YOU BET YOUR BOOTS] or [YOU BET YOUR LIFE].

[yours truly]  {adv. phr.}

1. Signing off at the end of letters.

Yours truly, Tom Smith.

2. I, the first person singular pronoun, frequently abbreviated as t.y.

As t.y. has often pointed out...

T.y. is not really interested in the offer.  […]

[yum-yum]  {interj.},  {informal}

- Used usually by or to children, to express great delight, especially in the taste of food.