Definitions by Donfuji

Snotblock 

Snotblocking is when you shout the preemptive "Bless you" to someone that is about to sneeze.

This may also apply to someone that has sneezed once and looks like they are going to sneeze again.

The sneeze version of cockblock.

<ACHOO>
Bless you, bro!
Imma sneeze again... <AA..
Bless you
Damn you! You totally snotblocked me!

Snotblock by Donfuji February 6, 2012