Resting Prison Face is the phenomena of someone making a particularly menacing or unapproachable face when outside, at all times. Also see resting bitch face for a similar effect.
Friend: "What's with your face bro are you angry or something"

Friend 2: "that's just my RPF (resting prison face)"

Friend: "oh, RPF bro, I get it
by BilliamShagspeare January 30, 2021
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The equivalent of ‘resting bitch face’ for an animal. Often seen on cats when it looks like they are angry, irritated, or about to attack you, but they’re actually relaxed and it’s just their face.
“Omg your cat is so angry, I’m scared it will attack me”

“Nah they’re all good, it’s just their resting fluff face, they are super friendly really!”
by Lasherbradley January 4, 2022
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When someone who is normally a smart ass is currently not saying or making a face which would normally be interpreted as being a smart ass.
David Jones is a prime example of resting smart ass face when he isn’t speaking.
by Clvegrl March 30, 2020
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The happy smiling face a seasoned hitchhiker wears while thumbing a ride.
Did you see that dirty hippy get that ride in only 5 minutes, he had resting hitch face.
by Marble1779 January 1, 2018
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An expression that is held by someone, typically (but by no means always) a woman. It is characterized by having a very slight scowl in the eyebrows, lips drawn in (sometimes occurred by sucking in the bottom lip), a pronounced tilt of the head, and a slight squinting of the eyes that would convey an expression of slight pain is discomfort. When performed properly, the sufferer should look to be perpetually constipated, and yet for some reason, utterly satisfied with being so. "Smug" is a common way to describe someone with a resting bitch face.

This expression is pronounced in its commonality, as in, it's the most common expression upon the sufferer's face. It is typically a signifier of someone who is arrogant, condescending, obnoxious or just generally bitchy. Commonly seen by journalists or other people commonly on TV.
I don't know how you can watch that show, the anchor has a massive resting bitch face. You'd think the higher ups would tell her to fix that.
by MJM1985 April 19, 2021
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Smiling while thinking smug thoughts
She sat silently while staring into the great blue yonder with a resting pleasant face as she plotted her sweet revenge.
by Loween18 March 10, 2017
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When a man has a resting bitch face, instead of calling it resting bitch face, its a resting dick face, or an RDF
by September 20, 2022
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