They crawl out of the anus and bite the ass in various places causing itchiness.
Then, when the subject goes to scratch the bites, they "beetchaback" to the anus.
This is where the creatures get their name.
Type your email address below to get our free Urban Word of the Day every morning!
Emails are sent from email@example.com. We'll never spam you.
Log in with Facebook to save your favorite definitions
and share them with friends.