Sometimes you're at the club and you bring a few
girls home and you're a little cloudy so you don't realize you brought home grenades. So it's up to your roommate to blow on the Grenade Whistle to
snap you out of it and bring you to your senses so you can
kick that grenade out.
If you bring a
girl home, and you are to drunk to realize she is a grenade. Your
friends will sound the Grenade Whistle to let you know that your girl is a grenade!