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"All the time" or "constantly."

It's derived from the term 24/7. 24/7 is actually a fraction, so we can calculate it in its repeating decimal form. 24/7=3.428571...

"3.4" is just used because it's much easier to type and say than the previously mentioned decimal equivalent.
Joe: OH NOES I GOTS TEH SHITZ!!!!111 I think im SICK AGAIN! =-o :-\
Phil: You're sick 3.4, you really need to go to the doctor... or go to bed at a normal time... OR stop eating fast food every day...
by no_one_2000 February 09, 2005
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Slang for anal sex, similar to 69 or 89.

The 3 represents a butt while the 4 represents the top vie of a man holding his penis towards the butt-hole.
I'm gonna let my boyfriend 34 me this thursday.
by someonelse March 25, 2005
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its ew.
Its the NEW ew.
<person one: I sneezed and now theres snot all over my screen!>
<person two: 34444444444!!>
<person three: 34??????>
<person1+2: it means ew, stupid n00b!>
by SAMMM! September 02, 2008
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