Tuff face 

The hardcore facial expressions a woman makes during intercourse sex with a big penis

She was making a tuff face after I slipped her the dick

Tuff face by Day 2 Day 1n Society October 5, 2011

facebook tuff 

Meaning a tough guy on facebook but when you see them in person they act scared.

Drew on facebook: ill fuck u up bro.
eric on facebook: wow, your so facebook tuff .

facebook tuff by erock75 September 23, 2013