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1.
123
Long time no see, 123.
by crackerjackx November 29, 2012
227 85
 
2.
123
Simple, often secret, way of saying I Love You over text or chat, without being too forward
Goodnight! 123!
by *Sparkle*123 August 18, 2010
126 36
 
3.
123
used in web forums to denote a quote that they entirely agree with 100%. the term "you took the words right of my mouth" comes to mind.

however, because they forums disable spaming by requiring people to type at least 3 characters per post... 123 comes to mind
bob: anarchy sucks

jim : "bob : anarchy sucks"
123
by jaredong May 19, 2005
135 123
 
4.
123
the numerical version of "abc".
Which means, "simple"

it is often used as a term denoting the word "numbers" or referred to counting

123 is also the first thing that comes to my mind when I hear the anything related to numbers or maths.
Do you know 123?
-----

It's as simple as 123
-----
by Nick Karoshi August 04, 2011
20 15
 
5.
123
Downloading the first three songs of an album to see if you like it before downloading the whole thing.
I 123'd the new Flaming Lips album but didn't like it enough to download the whole thing.
by Johnny B23 January 12, 2010
17 56
 
6.
123
the first numbers you learn in your early childhood.
one two three four five...
by Akuneko the Sly August 04, 2004
55 104
 
7.
123
the number you call (in the uk anyway) for the talking clock that goes on and on...
At the third stroke the time sponsered by accurist will be....
by a man March 28, 2005
25 85