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One plus One can equal Three without protection.
Who says math doesn't apply to real life?
1+1=3 by The Ugly One February 28, 2004
Reproduction joke. The "1+1" refers to two people having sex; the extra 1 represents a potential baby, making a total of 3 people.
"I'm gonna get laid tonight!"
"Whatever man, just remember sometimes 1+1=3."
1+1=3 by progamer124 January 4, 2005

1+1+2+4+8+1+6+2+3+2+8+3+8+4+9+6+2+7+0+7+7+9+1+1+0+1+1+3+1+7+1+1+5+1+2+2 

its a way of writing the number "127'
these arent random
some of you might notice a pattern
1+1 is 2 so you do
1+1+2 which is 4
1+1+2+4 = 8
1+1+2+4+8 + 16

when you get to 16 break it down to single digit and add them seperately so
1+1+2+4+"1+6"
you will get 23 so

1 + 1 + 2 + 4 + 8 + 1 + 6 + "2 + 3"
repeat
i suck at explaining things
did you know 1+1+2+4+8+1+6+2+3+2+8+3+8+4+9+6+2+7+0+7+7+9+1+1+0+1+1+3+1+7+1+1+5+1+2+2 is a way of writing 127

1+1=Fish 

in the korean geometric system it is believed that all things mathematical are equivalent to a food product. this was later enforced by ninja58 and believed throughout the entire mmorpg unvierse.
ninja58: what does 1+1=?
noob: 2?
ninja58: wrong its 1+1=fish you stupid noob!! sux0rs
1+1=Fish by JoseGuzman September 22, 2008
Pregnant.

Like one guy and one girl=one guy and one girl and one baby.
So, what happened last night?

Well: 1+1=3.
1+1=3 by youmeatsixfanatic February 22, 2011
"a husband and a wife form a union". Usually seen on yokel t-shirts.
1+1=1 by duggie October 28, 2003