jag /ˈʤæg/
  缺口,突出端,小量負荷,小夥子(vt.)使成缺口,使成鋸齒狀(vi.)刺,戳
  Jag n.  [Written also jagg.]
  1.  A notch; a cleft; a barb; a ragged or sharp protuberance; a denticulation.
  Arethuss arose . . .
  From rock and from jag.   --Shelley.
     Garments thus beset with long jags.   --Holland.
  2.  A part broken off; a fragment.
  3.  Bot. A cleft or division.
  4. A leather bag or wallet; pl., saddlebags. [Scot.]
  5.  Enough liquor to make a man noticeably drunk; a small “load;” a time or case of drunkeness; -- esp. in phr. To have a jag on, to be drunk. [Slang, U. S. & Dial. Eng.]
  Jag bolt, a bolt with a nicked or barbed shank which resists retraction, as when leaded into stone.
  Jag, v. t.  [imp. & p. p. Jagged p. pr. & vb. n. Jagging ] To cut into notches or teeth like those of a saw; to notch. [Written also jagg.]
  Jagging iron, a wheel with a zigzag or jagged edge for cutting cakes or pastry into ornamental figures.
  Jag, n.  A small load, as of hay or grain in the straw, or of ore. [Prov. Eng. &  Colloq. U.S.] [Written also jagg.]
  Jag, v. t. To carry, as a load; as, to jag hay, etc. [Prov. Eng. & Colloq. U.S.]
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  jag
       n 1: a sharp projection on an edge or surface; "he clutched a jag
            of the rock"
       2: a slit in a garment that exposes material of a different
          color underneath; used in Renaissance clothing
       3: a flap along the edge of a garment; used in medieval
          clothing [syn: dag]
       4: a bout of drinking or drug taking
       v : cut teeth into; make a jagged cutting edge
       [also: jagging, jagged]