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1.
abbreviation of joked the fuck out,
which means your laughing really hard.
Hahahaha, then he fell and hit the concrete. I was JTFO!
by agbulmer February 28, 2010
 
2.
The abbreviation of Jog The Fuck On.

An expansion and adaptation of the traditionally English phrase, Jog On.
The addition adds an element of gusto and offence, for those times when the simplicity of the original phrase just don't relay your feelings as fully and emphatically as they could.
<tehAntiNewb> hiz0rz, we play clanwar tomorrow at 1730 on our clan server as otherwise my ping is like 9834301
<n00b^basher> jtfo
by Green^Ranger February 06, 2008
 
3.
The abbreviation of Jog The Fuck On.

An expansion and adaptation of the traditionally English phrase, Jog On.
The addition adds an element of gusto and offence, for those times when the simplicity of the original phrase just don't relay your feelings as fully and emphatically as they could.
<tehAntiNewb> hiz0rz, we play clanwar tomorrow at 1730 on our clan server as otherwise my ping is like 9834301
<n00b^basher> jtfo
by Green^Ranger February 07, 2008