Top definition
When you spend a night watching porn,fapping and whatching youtube videos up to 4 a.m in the morning,which happens to most teenagers.
'Hey Bill,wanna come to play Smash Bros tonight with the gang?'

'No, thanks...tonight is my fapnight'
by Irradiatedpeanut November 09, 2015
Get the mug
Get a fapnight mug for your Aunt Riley.