An acronym standing for "Tips for Life" and is usually followed by a suggestion to prevent someone from looking like a n00b.
If someone were to fart and exclaim, "Guys I farted!"
You may say, "TFL: Don't announce to us that you farted."
-or-
TFL: don't sound like an idiot.
You may say, "TFL: Don't announce to us that you farted."
-or-
TFL: don't sound like an idiot.
by Nick Wedge and Ryan Wilson May 10, 2005

Transport For London (www.tfl.gov.uk/) is London's transport website. If you need to know how to get anywhere by public tranport in London use tfl
by emmaleighjohnson June 30, 2008

Those Nike Dunks are TFL, broseph.
by Devon May 13, 2005

by Freddythegoof October 22, 2016

President Bush is a TFL. I can't believe half this country is stupid enough to vote for him.
I asked her to dance and she said "TFL" as she turned and walked into the dark.
I asked her to dance and she said "TFL" as she turned and walked into the dark.
by pdm2 September 28, 2005
