What does RBF mean?
Resting Bitch Face - When you naturally relax your face and your expression makes you look angry, upset or displeased.
Other definitions of RBF:
Really Bout to Fight - a popular expression used in New Jersey when a situation becomes tense.
Really Bad Friend - Someone who claims to be your friend without demonstrating friend like qualities.
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How to use the term RBF:
"Sorry if I look unhappy when I'm not smiling. That's just my RBF."
"Did you see those drunk guys? They're RBF out here."
"Wow! Lisa is the definition of an RBF."
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