Drinking excessively, especially during the week, and staying out until last call. Usually needs to happen more than one consecutive night in order to really count as Flintering, but getting completely blitzed can still qualify. Originates in Ireland.
"Darrach, why do you look so tired? You have a big proposal today!" "Man, I've been Flintering all week. I'm WRECKED!"
The party was at 9pm, but I was Forstering about with Facebook and finally got in the shower at 8.55.
Simon had been Forstering about and home with some quackish treatments for McDonaldism and, by the time he actually got to the docks, all the best sailors had been taken. As such, he ended up having to go home with Vladimir One-Bollock, who also has syphilis. That'll teach him.