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1.
An acronym for the phrase "Thank god I'm pretty"
Used after an epic fail.
For example:

After Emma slipped and landed on her ass, everyone started laughing. To express to her peers that she is confident enough to laugh at her self she would say,"TGIP".
by seniors2011watsupbitches September 13, 2011
36 4
 
2.
Thank God I'm Pretty: when you do something stupid, a cover up for the mistake.
You: I got benched for the whole game. TGIP.
by matarocks September 13, 2011
35 6
 
3.
Acronym for Thank God I'm Pretty created by Mataponi Seniors 2011
"I just got a D on my test whatever TGIP"
by MATAPONISENIORS2011 September 14, 2011
28 6