Grog is a magical potion that is commonly served in bars and pubs that bestows upon the drinker awesome powers.

Possible awesome powers include;

Becoming the most knowledgable and funny man alive.
Superhuman strength.
Inability to feel pain.
Inability to stand up.
Desire to mate with the nearest member of the opposite species, regardless of their level of attractiveness, availability, or how dead they are.

I love grog.
"Come on, you grog swilling grogger, let's get down to the grogging grog shop before we run out of grog"

"I love grog"
by Martyn 'Grogsbury' Chuzzlegrog December 05, 2003
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A kind of beer or lager that is usually consumed by mighty pirates with a side of pretzels.
Yarr, I'm Guybrush Threepwood, mighty pirate! I drink my grog and plunder the mysterious isles of Lucre, Jumbalaya, and Monkey.
by Puchie D November 11, 2002
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Current usage of grog is a group blog, or a blog made up of several people who blog about a common subject or lifestyle.
Some current writer's grogs include: The Debutante Ball, Killer Year, Murderati, and Good Girls Kill For Money.
by Kristy Kiernan March 06, 2007
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Big hairy lovable creature. Love to drink Rum.
Holy fuck did you see that grog running across our lawn.
by Chris Urban December 15, 2003
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