An imaginary line dividing coastal areas from more inland areas in certain southern states in the U.S., especially the Carolinas and Georgia. The term comes from the abundance of gnats in coastal marshlands and swamps in these states and the relative lack of the insects in the inland regions.
I’m not from the piedmont. I’m just east of the gnat line.

The city has grown so big, it’s like everything north of the gnat line is considered metro Atlanta.
by kidviscious March 1, 2007
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An extremely small unit to measure things by, subdivided into a `gnat's dick-end´, (about 8 to the gnat's dick), and a `gnat's cock-hair´, (about 12 to the gnat's dick-end) thus giving an imperial scale of 96 divisions. This sort of accuracy is essential if you're trying to get people on the moon, and maybe one day we will!
Hebden Bridge council worker to oppo,who's struggling to put up a lamp post:
'Move bugger a gnat's dick toward canal'
Oppo gives a shove the wrong way.
'Aye lad, another gnat's cock-hair and yer reet.'
by MisterE February 4, 2006
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1. A small penis or the man who has one.

2.A man who shows cowardice or fear.
1. Girl1: I heard he has a gnat dick.

Girl2: Lololol

2. Guy1: I don't want to fight you.

Guy2: Go home you fucking gnat dick loser!
by Nobli June 24, 2015
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To be very impatient
I have the patience of a gnat.
He won't be able to wait that long. He has the patience of a gnat.
by LydiaRae May 3, 2018
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poon tang backwards. used when doggin on your friends.
Quit bein such a gnat noop
by liveSTRONG2801 November 2, 2007
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Something very small, minuscule, also implying closeness or being close to something
We are within a gnats nadger of winning this deal
by Swinedog May 28, 2020
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If something is extremely tight, then it could be said to be 'tighter than a gnat's chuff.'
"So there I was yeah, just pulled this crackin' bird yeah, took her upstairs, took her mini off, and whoa! She was tighter than a gnat's chuff!"
"Colin, please don't talk like that at the dinnertable."
by Bonny lad November 11, 2004
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