Very small measurement used by toolmakers & engineers, or roughly .0001 or one ten thousandth of an inch. Actual size may vary between shops, but always much less than a pussy hair. About one tenth of a skosh which is equal to approximately one nudge of the dial.
Note: When specified, generally regarded as smaller than the smallest one can measure or produce, since while most people intuitively understand that a gnat's ass is prettysmall, few have actually bothered a gnat to measure one.
An imaginaryline 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.
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.'