poop knocker

When your turtle head hits your underwear...

Man I have a poop knocker I better find a toilet soon. -or- Man this is the third poo knocker I've had this week, pretty soon I'll be out of underwear!

poop knocker by ConfuciusSay February 4, 2015

pooknocker 

noun. Like a fartknocker; Old English, no longer used in contemporary language.

"Thy pooknocker, hath thou not seen?"

pooknocker by Morgan Billy Bob Joe October 21, 2003