Frummelling

The act of frummelling beings by shaking a tinned beverage, usually a beer and usually of the longer tinned variety. After a healthy dose of shaking, the frummeller carefully places each hand on either side of the beverage getting it parallel to the ground. In one vigorous motion, the frummeller hastily lifts his hands towards his forehead whilst performing a headbutt aimed at directly at the middle of beverage, the aim being to split the tin in half. Only one attempt is allowed. Frummelling normally takes place in groups so that if one person fails, the beverage is past on until success is reached. If particular penchant and skill are displayed by quick dispatch of the tin, participants may earn the coveted name 'cone head'.

A drinking game where a bunch of drunk males (females are welcome too, though they rarely choose to participate) stand around in a circle with one unopened can of beer. The first player shakes the can vigorously and then smashes it against his forehead. The can is then passed to the left. The next player shakes it vigorously and again smashes it against his forehead. The game continues in this fashion until the can eventually explodes against the forehead of one lucky guy, thereby making him the winner of the frummel and earning him the respect of his peers.

Noun and Verb.
The sudden urge to fall asleep NOW, knowing that if you do not, you will not be able to fall asleep for an extended period of time, usually 4 or more hours. An instance of this urge.
To posess this urge.

Frummeling often afflicts those over 40.

Coined