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1.
Tight life is something that happens when you feel like you have been screwed over, if you feel upset, or something bad happens.
Tight-life, I just got a 50 in math.
by Sax Man94 October 26, 2011
 
2.
When someone has faked or done something really dumb/immature; sarcastic version of "wow you're cool"
Someone who sits at home adding friends on facebook has a tight life
by L2C February 12, 2009