Twelfty 

A lot.
To signify a lack of knowledge of some numerical data.
An answer to use when you want to annoy or simply not answer a question correctly.

Can also be spelt '12ty'

'I can well do more bounces on a pogo stick'
'No no, i can do twelfty more than you!'

'What time is it sir?'
'Twelfty'

Twelfty by Luka Atkinson June 27, 2008

twelvty 

Whatever number you like. Used in numerous instances, like suggesting a lot, or if you can't be arsed to figure out the actual number.

"What's the time?"
"Uhh.. about twelvty?"

"I heart you twelvty"

"Bloody hell, there's a group of about twelvty chavs over there"

twelvty by Grunge Monkey August 28, 2005

twelfth 

Ugliest word in the English language.

Just don't say twelfth. It's disgusting.

twelfth by FonekRucke November 23, 2010

Twelfth Base 

Fucking a girl so hard she dies.

Steve: Man I fucked Katie so hard last night that she died while cumming.

Aneesh: Really, twelfth base? How was her funeral?

Steve: I got to thirteenth base at it.

Twelfth Base by Steve from Canada (1) February 4, 2010

twelfth night

A play by William Shakespeare involving a drunk guy, a pirate, a girl pretending to be a eunuch, another girl who has a thing for eunuchs, an idiot, a stuck-up puritan, and an emo clown. It contains lesbian and gay undertones and has some sweet insults. Best thing ever.

"If music be the food of love, play on!" - Twelfth night, I.i

twelfth night by Romanshoes September 8, 2007

twelfth 

Dying while engaging in sexual intercourse, usually by heart attack.

Yeah I hit twelfth base last night. The funeral will be held this Saturday and the cops are still after me.

twelfth by ljfox4 March 3, 2009

at the twelfth hour 

too late.

You came at the twelfth hour. Everybody has already left for home.

at the twelfth hour by uttam maharjan July 13, 2010