A Grenn usually means he is insecure and has a short temper, but whatever you do, don't mix his name with the color green,
if you do he'll slap you with his nuts. He is nice to the people who are not nice. he usually slaps people with his balls randomly be careful. He never cuts his hair especially down there, thats why it looks so majestic.
"Joseph is such a grenn"
"Toby please do not be a grenn and slap me with your nuts"