Top definition
1)A classroom riot, whereby pens are feverently thrown about the room, often at somebody.

2)As 1, but involving a fat semi-naked maths teacher grabbing fistfuls of pens and rubbing them on himself, often with loud, cheesy disco music and/or a mirrorball.

3)Any celebration of this sort
When I shouted PenFest, I had no idea that Mr Munro would burst in and rip his shirt off!!!
by Toryboy February 23, 2006
Get the PenFest neck gaiter and mug.
Jun 16 Word of the Day
Abbreviation for “Dude Arguing Online”.

Plural: “DAOs”

Coined by Twitter user @karakittel.
Would the internet exist without DAOs? Sadly, I don’t think so.
by monkeylabor June 13, 2021
Get the DAO neck gaiter and mug.