2138008 

Acutally, 2138008 on a calculator upsidedown says "BOOBEI(backwards)S"
Boobies=5318008
Boobless=55318008
Something you do in your spare time in 6th grade math class.

Kid1- *types 2138008 into calc* "Look at what I can spell."
Kid2- "Idiot, the S is backwords and the I&E are switched."

2138008 by ElzyAnn September 14, 2006

2138008 

Actually, it spells BOOBIES, not BOOBLESS.. That would be 55318008

All the geeks in grade school did this when they wanted to get a girl's attention.

2138008 by Jenny April 8, 2005

2138008 

A number sequence typed into calculators or other digital devices by immature junior high students to display a naughty yet juvenile message. The message, when flipped upside down, clearly reads, "BOOBLESS."

See also 7734206

Bobby: "Hey, look at this!"
Johnny: "What?"
Bobby: "This describes our stupid teacher... ::types into calculator, holds it up to Johnny::
...she's BOOBLESS!!!"

2138008 by kuroneko August 21, 2003