US     You Suck
usa or USA     Until Sides Ache:  Usually used with one of the laughter acronyms such as "lolusa" Laughing Out Loud Until my Sides Ache.  I've also heard that some folks substitute ush for "Until Sides Hurt".  rotflolush = rolling on the floor, laughing out loud, until my sides hurt.
UV     Unpleasant Visual
UW     yoU're Welcome
UY     Up Yours

vp or VP     Virtual Places: A brand of chat offered by Excite in the late 90s and early 2000.

WB     Welcome Back (you say this when someone returns to a chat room)
WC     WelCome
WEG     Wicked Evil Grin
WEU     What's Eating You?
WFM     Works For Me
WIIFM     What's In It For Me?
WTG     Way To Go
WTF     What The F**K
WT?     What The ...? or Who the ...?
WTGP?     Want To Go Private? (move to a private chat room)
WWJD     What Would Jesus Do?

YAA     Yet Another Acronym
YBS     You'll Be Sorry
YL     Young Lady
YM     Young Man
YMMV     Your Mileage May Vary
YR     Yea, Right.  (sarcastic)
*ys*     You Stinker
YVW     You're Very Welcome
YW     You're Welcome


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