Yesterday in my computer programming class my teacher said “irregardless” and, I kid you not, a shudder went down my spine. And just now, realizing I just used a literary cliche, I shuddered again. Gettin’ cold in here!

What things make you jerk, wince, or squirm in private horror? Here are some of mine:
The “c” word, the only word so horrible I will never use it myself
Miley Cyrus’s voice
The smell of ranch dressing

Others?