Slangs

u-ee    Noun. A u-turn. A term used by drivers.
ugly as sin    Phrs. Very ugly.
umpteen    Adj. Many, a lot of. E.g."There was umpteen colours to choose from."
Uncle Dick   Adj. Sick, unwell. Rhyming slang.
Uncle Ned   Noun. 1. The head. Rhyming slang.
2. Bed. Rhyming slang.
Uncle Tom   Noun. A black person. Derog./Offens.
undercrackers    Noun. Underpants.
underkecks    Noun. Underpants.
under the weather    Phrs. Out of sorts, not currently in good health. {Informal}
unhinged    Adj. Insane, mentally unstable and unpredictable.
uni    Noun. Abb. of university.
unmentionables    Noun. 1. A coy euphemism for undergarments. [1900s]
2. A coy euphemism for genitals.
unreal    Adj. Fantastic, excellent, wonderful. An expression of approval. [Orig. U.S.]
up    Adj. Intoxicated by drugs, high.
up and down like a whore's drawers   Phrs. Of a person, unsettled, agitated, unrestful. Numerous variations exist, i.e. whore may be replaced by prostitute or tart, and drawers with knickers.
up and down like Tower Bridge    Phrs. 1. Fluctuating, moving up and down.
2. Emotionally unstable
upchuck *   Noun. Vomit.
Verb. To vomit.
* From 'chuck up', meaning to vomit.
up for it    Phrs. Phrase encompassing the enthusiasm of a person for an event. Particularly evident within the British club scene in the 1990s with the crowd being 'up for it'.
uphill gardener    Noun. A homosexual male.
up on blocks   Phrs. Of a woman, menstruating and therefore unavailable for sex. From being out of service and unusable, like a vehicle in for repair.
upper    Noun. A stimulant drug, usually amphetamine sulphate.
up shit creek    Phrs. In serious trouble. An adaptation of the saying 'up the creek without a paddle', meaning the same.
up sticks    Verb. To move on, to settle or live elsewhere. {Informal}
up the duff    Phrs. Pregnant.
up the spout    Phrs. Pregnant.
up the suff   Phrs. 1. Down the drain. [W. Midlands use]
2. Wasted, broken. [W. Midlands use]
up the swanny    Phrs. In a hopeless situation. Meaning the same as 'up shit creek'.
up the wrong 'un   Phrs. Up the anus. From up the wrong one.
uptight    Adj. Frigid, conventional, stressed. [Orig. U.S.] {Informal}
up your bum!   Exclam. 1. An angry and dismissive exclamation.
2. Cheers!
up your clunges!    Exclam. A dismissive and angry exclamation. See 'clunge'.
up yours!    Exclam. Exclamation of anger or defiance, usually directed at someone.
Uri (Geller)   Noun. Stella Artois, a popular brand of lager. Rhyming slang on Stella. Uri Geller, famous for his involvement in scientifically unexplained phenomena, such as bending metal spoons by the use of the power of mind.
use one's loaf    Vrb phrs. To think, to use one's ingenuity, to use one's head. Loaf (of bread) being rhyming slang for head.
use one's noggin    Vrb phrs. Meaning the same as 'use one's loaf'.