Top definition
Short for "Just Fucked Glow"

A look of contentment that comes over people after having really good sex, or a particularly intense orgasm.
Wow Lori, you have a really nice JFG!
via giphy
by Planarroulette August 21, 2017
Happy St. Patties Day!
jfg, another from of web lingo, is similar to wtf, or omg, meaning 'just fucking great'.
jfg, mom just got home, g2g, ttyl.
by wjdb August 06, 2008
Happy St. Patties Day!
Meaning "Just Fucking Google it". Said to people who have asked questions where the answer can be found by a quick google search.
"What's the capital of Australia?" "JFG!"
by Wellnz December 15, 2009
Happy St. Patties Day!
when you are very drunk and sleep in your own pish...
i can't believe you just did that pampers that is a J.F.G.
by NEIL PATIENCE March 23, 2007
Happy St. Patties Day!
Jesus Fā€™ing God
Man, I posted that I was looking for a date for flag day, but left out the ā€œLā€.

by RangerGeek February 18, 2018
Happy St. Patties Day!