Better known as Krystal's hamburgers. They usually feel like someone dropped a frag grenade in your stomach, as well as leave shrapnel in the toilet... later in the day.
Hey bob, lets stop by Krystal's and pick up a couple of gut grenades.
bad or hevly upseting food you have eaten to cause explosive diarrhea. also afeliated with the toco bell's big bell value menu. or a.k.a gas station
that food was a gut grenade.
Something that you get from McDonalds that makes your gut feel like it was punched in the stomach a few times.
I was in a hurry so I had to get a gut grenade....man that hurts!!!