No panty friday. This tradition includes both men and women of all ages. (For boys, this DOES include boxers). If a person goes commando more than just fridays, feel free to substitute the F with other days of the week. This is not to be confused with NCS (no clothes saturday).
"You're NPF today, right??"
"ummm, I'm wearing a skirt. Of course I'm wearing panties"
"But today is friday..."
"Today is friday? Oh my gosh, give me 30 seconds. I'll be right back!"
by BINA! November 11, 2011
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Text/internetspeak abbreviation for: "no problem, friend."
Jon: thanks for your help :)
Jane: npf; lemme know if you need anything else
by stellarfuzz August 4, 2014
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Swedish abbreviation for neuropsychiatric impairments. This is an umbrella term for Autism, Schizophrenia, Tourette's, ADHD and OCD.

"There are many people with NPF who are taken into care."
Det finns många med NPF som tas in på vården
by Crowbardoctor February 27, 2023
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