A fork of Rural Dictionary
1. Someone who is always in a bitchy mood and/or PMSing.
Sam: "My mom is always pissin' me off and bitchin' me out." Gage: "Dude, she's a perma-bitch."
Most women express 'resting bitch face' in certain situations. Some women always have a bitch face. Hence, perma(permanent) bitch face.
'That lady Wendy always looks pissed off & angry.' "Yea, she suffers from perma bitch face."