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1. Gtk
its the acronym for " Good to know", it can be used in terms of sarcasm or actuality
Valencia: your face looks odd
Rose:Gtk
2. GTK
Short for "Get the Keg".

Used when someone is about to do something so stupid that you don't even want to remember.
Retard: Dude, I'm gunna light my car on fire!!
McRetard: Ahh god gtk.
3. gtk
good to know
1: i farted

2:gtk
good to know farted i
by lovadkfs Jun 29, 2010 add a video
4. GTK
good to know

--said when someone say something that is good to know
GTK!
5. gtk
An acronym for the phrase 'get the kill' meaning to have sex with a certain individual.
Boy 1: Hey bro I'm chilling with my girlfriend tonight!
Boy 2: Sweet man, gtk!
6. gtk
short for Good To Know.
He let me know she had chlamydia via IM and I said "gtk".
by bartcatz Jan 4, 2005 add a video
7. GTK
Good To Know

Said when people tell you things you don't really care about or want to hear.
Ashley: I'm having my period right now.
Chris: GTK Ashley
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