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1.
An abreviation used on the internet or in text messages standing for Having-A-Gentle-Giggle, similar to LOL or ROFL in today's world. Generally it is only used on the internet or in text messages and not in everyday life.
Person 1: A man walked in to a bar, ouch!

Person 2: Hagg
by tracka52 April 20, 2009
 
2.
1. Someone that is a dick
2. Someone that takes sides
Hagg stop being a hagg!
by Sam Wolfe September 24, 2007
 
3.
Have a good game
by Anonymous September 18, 2003
 
4.
To be to much effort.
person 1 : is it to much hagg?
person 2 : yeh fuck off
by Lukeeeeeeeeeeeeeeeeeeeeeeeee March 31, 2008