A person that you are often associated with, and that you know like a friend, and might even occasionally hang out with, but that you absolutely hate.
Looking back on high school, Trent realized that he had far more hatemates than friends.
by my_posse_rolls_shallow October 28, 2009
a person that you love and hate at the same time, an ex girlfriend you haven't quite gotten over, a competitive childhood friend, your annoying brother

Everytime I see Tyson my heart skips a beat, however I can't get over the hpv he gave me. He is soo my hate mate.
by mikehunt1017 November 09, 2006

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