The shiver that travels up your spine when you have to take a huge dump. It makes your shoulders jerk and your voice will most likely crack if you are speaking. The weird thing is no one ever seems to notice.
So I was wal-KI-ni-ng..." "Aha." "Just got the shit chills. Be right back.
When you have to crap, but can't get to a bathroom and you stand perfectly still, clenching. Then your body shakes briefly like you were standing in 20 below weather.
I had to dump at the concert but I didn't want to miss "Hammer Smashed Face", so I held it in and got a shit chill.