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1.
LTF
An acronym that holds great significance when dealing with a religious retreat for young adults in high school called "Kairos". The acronym's meaning is learned sometime over the course of the retreat. Only people who have gone on a Kairos retreat know what it means and are not allowed to tell anyone who hasn't gone what it means (I have gone). The only way to know what LTF stands for is to go on the retreat yourself.

-LTF 112
"What does LTF mean?" "Have you gone?" "No" "You have to find out for yourself on Kairos then."
by kjbassmastur21 August 21, 2009
 
2.
LTF
Live the Fourth

1. Doubt the First
2. Cry the Second
3. Trust the Third
4. Live the Fourth
LTFing is the way to live your life.
by givinitup247 June 29, 2010
 
3.
LTF
Looking To Fuck
Dude a lot of girls at the party last night were LTF
by Dude435 January 06, 2009
 
4.
ltf
ltf: Like to fuck
dude i so would ltf that hot girl from the bar last night!
by Keith Petree July 18, 2008
 
5.
LTF
LTF means "love that feeling." The slang sprouted on a social site, Pheed, and is becoming increasingly popular.
When you open your refrigerator and there's food #LTF

When something makes you happy, LTF
by sam meeker June 10, 2013
 
6.
Learn to fucking spell
It's called "you're", LTFS
by jonas gahr støre October 01, 2009
 
7.
Losing their fucking shit
I got home late and my parents were totally LTFS.
by mmcol September 28, 2010