and 1 

In 1992 Larry Johnson of the then Charlotte Hornets was playing basketball. He got fouled and made the basket. You get the points from the shot "AND 1" free throw. Which he started yelling when he played.
The original logo of the AND 1 company is Larry Johnson.

yo, i made the basket, and 1 fool!!!

and 1 by Joe Fresh April 9, 2005

2 and 1/2some 

A threesome involving two normal adults and a midget.

Me, Cindy, and Clara had a 2 and 1/2some.

2 and 1/2some by Blunt Roller June 17, 2009

18 and 1 

Synonymous with complete failure despite supreme confidence. In perhaps the biggest upset in Super Bowl history, the NY Giants defeated the heavily favored New England Patriots who entered Super Bowl XLII with a perfect 18-0 record. So sure of themselves, the Patriots filed applications to patent the phrase "19-0" and "19-0 The Perfect Season" more than a week before the game, only to have their collective asses handed to them by the Giants.

see also ryan leaf

(failing a final exam despite having an A average going in) Boy, I really went "18 and 1" on that exam.

(losing the war in Iraq despite superior force going in) When will Bush ever realize that we went "18 and 1" in Iraq?

18 and 1 by SaMo Snatcher February 5, 2008

18 and 1 

to work at something and nearly accomplish something great, before failing at the end

Jimmy had an 'A' going into the final exam, but did poorly and therefore, went 18 and 1 in the class.

Entemology: The Patriots were undefeated going into the Super Bowl, but went 18 and 1 for the season.

18 and 1 by D. J. (from PSU) January 11, 2009

1 and 1 

a dimebag of heroin and cocaine each.

bubbles (buyin from east side hoppers) - yeah uhh ill take a 1 and 1, here be $20

bodie - hey yo bubbles, why you buyin from east side niggas? ill give you the dope and coke for 15, and the ice for another 5

bubbles - aight yo

1 and 1 by Hawaiian Dicking December 20, 2009

1 and 1/2

Fucking thick asss dick

Girls love the 1 and 1/2 thickness of my cock

1 and 1/2 by Absince of life :( January 18, 2017

18 and 1 

To screw up at the end, to be imperfect

Joe thought the night was going good for him but he turned out just to be 18 and 1.

18 and 1 by Your Name, really January 11, 2009