Yet another, slightly milder version of internet trickery (See: Meatspin, tubgirl, goatse and lemonparty) where a repeated clip is shown of a man lightly tapping his penis with a hammer.

when you're hungover as shit after a spending a night drunk as a skunk

A website featuring a looping image of a man repeateadly hitting his penis with a hammer, to a clip of the song "U Can't touch this" by MC hammer.
There is also a title of the page, reading "Welcome to the pounder".
The pounder is a shock site, designed to shock unsuspecting internet browsers thinking that the site is about something other than hitting your penis with a hammer.

The pounder is our god and he will protect us from all that is evil. Everybody loves him and should at all costs protect him. You should also pray to him every day or else he will pound you hard. There is no chance to escape to just accept your faith and try not to be pounded.