1. Two parties looking to beat each other up, or 'knock the snot out of them', whether it be 2 fighters, 2 sports teams, etc.
2. What a woman has once someone sneezes on her chest.
"The Skins and Eagles are both snotknockers tonight - they just came to crush eachother and see how many players they could take down!"
"Achoooo!" "Damn, did you have to sneeze on my tits?!" "Haha, now they're snotknockers!"
2007. szeptember 19.