jag

¹ American  

[jag] / dʒæg /

noun

1. a sharp projection on an edge or surface.

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verb (used with object)

jagged, jagging

1. to cut or slash, especially in points or pendants along the edge; form notches, teeth, or ragged points in.

verb (used without object)

jagged, jagging

1. to move with a jerk; jog.

jag ² American  

[jag] / dʒæg /

noun

1. a period of unrestrained indulgence in an activity; spree; binge.

   a crying jag; a talking jag.

2. a state of intoxication from liquor.

3. Northern, North Midland, and Western U.S. a load, as of hay or wood.

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J.A.G. ³ American  

Or JAG

abbreviation

1. Judge Advocate General.

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jag ¹ British  

/ dʒæɡ /

verb

1. (tr) to cut unevenly; make jagged

2. to catch (fish) by impaling them on an unbaited hook

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noun

1. an informal word for jab jab

noun

1. a jagged notch or projection

jag ² British  

/ dʒæɡ /

noun

1. 1. intoxication from drugs or alcohol

   2. a bout of drinking or drug taking

2. a period of uncontrolled activity

   a crying jag

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Jag ³ British  

/ dʒæɡ /

noun

1. informal a Jaguar car: often understood as a symbol of affluence

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JAG ⁴ British  

abbreviation

1. Judge Advocate General

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Other Word Forms

• jagless adjective

Etymology

Origin of jag¹

1350–1400; late Middle English jagge (noun), jaggen (v.), of obscure origin

Origin of jag²

1590–1600; perhaps originally load of broom or furze (compare Old English ceacga broom, furze)

Explanation

A jag is a sharp area that protrudes from a surface, a pointed bump or knob. The walls of a cave, rather than being smooth, might be lined with rocky jags. You'll encounter jags when you're mountain climbing or walking along the rocky coast. To "be on a jag" or "go on a jag" means to be completely unrestrained, whether you're on a drinking jag or a crying jag. This second meaning is of U.S. origin, first meaning "a load of hay or wood," and later "as much drink as a man can hold," in the 17th century. By the 1880s, it was "a period of unrestrained activity."

Example Sentences

Brook was helpless when Deep got the ball to jag back from outside off stump.

From BBC • Jul. 6, 2025

Since its buying jag began, the company has filed suit in federal court against a group of families the firm purchased property from, seeking $510 million.

From Los Angeles Times • Aug. 31, 2023

Or has he been on a crying jag?

From Slate • Aug. 24, 2023

When state lawmakers gathered this past week to fight about guns, they ended up going off on a jag about something else entirely:

From Seattle Times • Mar. 11, 2023

For several days she was on a laughing jag.

From "Stargirl" by Jerry Spinelli