Definitions by Andrew Hagen

SlobKnocker 

A girl who gives you head and while doing so hits your balls with her chin.

"I fucked Marry so good last night but damn she's a Slobknocker"
"A slobknocker?"
"Yeah she was deepthroating my dick and she kept hitting her chin on my nuts"

SlobKnocker by Andrew Hagen September 2, 2017