A person is jumps on a grenade
. These people are normally wounded in action received the shear ugliness of the 'nade that they deserve a Purple Heart. If a grenade jumper
jumps on so many 'nades, he will win a Medal of Honor for going above and beyond the call of duty. Actually war heroes from wars are to be respected. This kind of war hero is laughed at but you want him around to be the grenade jumper that allows you to mac on a hot chick.