Referencing the beginning of a particular event or happening, esp. if the day cannot be remembered/was never specified.
Who you backing in dis fight bruv?

Man's backing Leroy yugetme, we've been friends since day!
by SansPeur17 July 1, 2011
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Always been real, since the beginning.
I don't have to front or fake, because I've been A 1 since day 1.
by TPAPA January 20, 2015
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The amazing local emo like band from the boring city of pollution itself, Windsor, Ontario. Consists of insanely hot drummer...and three other guys.
Wow...That drummer guy is the sex.
by [x][jackIE - l e E][*] June 1, 2005
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