git
(git)
A foolish or worthless person.

The word get is sometimes used as a noun to mean "something that is begotten," i.e., "offspring." This same sense is reflected in the Scottish use of get to refer specifically to a "b*stard," and more generally to a "brat," "fool," or "idiot." Git is thought to be a variation of get used in this sense.
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gobbledygook
(GOB-ull-dee-gook)

Windy gibberish or jargon.
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gormless
(GOHRM-liss)

Dull, stupid, clumsy; lacking in intelligence or vitality.

This handy word is a variation of gaumless, the word gaum being a Scots dialect term that means "attention" and "understanding." Thus if you call someone either gaumless or gormless, you're saying that he or she is lacking in sense, dull-witted, and in other words, pretty much out to lunch.
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gound
(gownd)

The gunk that collects in the corners of your eyes when you sleep.

For some reason, intrepid etymologists have traced this word back only as far as Old English gund, meaning "matter."
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gowpen
(GOW-puhn)

Two hands placed together to form a bowl.

Or, the amount that can be contained in a pair of cupped hands. This "handy" word is of Scandinavian origin. (By the way, if you get tired of saying gowpen, you can always use yepsen, a linguistic relative that means the very same thing.)
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gridiron
(GRID-EYE-urn)

A football field.

In Middle English, a gridel was a set of parallel metal bars upon which foods were placed for broiling. This word is a descendant of Latin craticula, meaning "little lattice," the source also of English grill. Over time, gridel evolved into gridiron, and eventually the cooking device bequeathed its name to the playing field that resembles it.

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Pinhead

I use 'git' all the time, much to the amusement of my hubby. He thinks it sounds cute with my accent. My stepkids have started saying too - a naughty word without being rude.