acronym,abreviation

U	You
U.U	Expressing sympathy
U2	You Too
U2U	Up To You
UA4I	You Asked For It
UARK	You Already Know
UAS	Ugly As S**t
UB2	You Be Too
UB3R	Uber, very
UBD	User Brain Damage
UBER	Ultimate, best (German for above)
UBRS	Upper Black Rock Spire (WoW)
UC&P	Up Close and Personal
UFB	Un F***ing Believable
UFO	Unidentified Flying Object
UG	Ugly
UG2BK	You've Got To Be Kidding
UGC	User Generated Content
UGG	Sheepskin boot Ugly
UGGO	Ugly person
UGH	Expression of disappointment or disgust
UHQ	Ultra High Quality
UHU	Misspelling of Huh
UI	User Interface
UK	Are You OK? United Kingdom
UKWIM	You Know What I Mean
UKWUR	You Know Who You Are
UL	Upload
UMBJ	You Must Be Joking
UMTWTM	You Mean The World To Me
UN	United Nations
UNDERCARRIAGE	Crotch
UNESCO	United Nations Educational, Scientific and Cultural Organization
UNF	Universal Noise of F***ing
UNI	University
UNICEF	United Nations Children's Fund
UNK	Crackhead
UNO	You know
UPS	United Parcel Service Uninterruptible Power Supply
UPT	Uptown
UR	You Are
UR	Your
URAQT	You Are A Cutie
URGH	Expression of annoyance, displeasure
URI	Uniform Resource Indicator, URL
URL	Uniform Resource Locator, internet address
URM	You Are Mad
URNS	You Are An A$$
URW	You Are Welcome
URYYFM	You Are Too Wise (two y's) For Me
US	United States
USB	Universal Serial Bus
USBM	United States Black Metal
USC	University of Southern California
USPS	United States Postal Service
USS	United States Ship
UST	Unresolved Sexual Tension
USW	Und So Weiter (German for etc)
UT	Unreal Tournament
UTC	Coordinated Universal Time Under The Counter
UTE	Utility vehicle, pickup truck
UTF	Unicode Transformation Format
UTFG	Use The F***ing Google
UTO	Unable To Obtain
UTT	Under The Table
UV	Unpleasant Visual
UW	You're Welcome
UY	Up Yours
UYA	Up Your Ass