1) term used by people that are actually having sex, but dont want others to know.

2)In women speak, it's a term that defines a relationship as never having been, nor never will be sexual in nature. (see also cut his balls off)
1)Tommy told his friends that he wasnt boning Laura, but that they were just good friends.

2)Mark knew his chances for booty were up when she said they were just good friends.
by k_sadler July 12, 2004
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what a chick says when she thinks your butt ugly and smell like shit
look greg, i like you alot, but i think we should be "Just Good Friends".
by TJA July 13, 2004
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