To crack on

Crack \Crack\ (kr[a^]k), v. t. [imp. & p. p. {Cracked}
   (kr[a^]kt); p. pr. & vb. n. {Cracking}.] [OE. cracken,
   craken, to crack, break, boast, AS. cracian, cearcian, to
   crack; akin to D. kraken, G. krachen; cf. Skr. garj to
   rattle, or perh. of imitative origin. Cf. {Crake},
   {Cracknel}, {Creak}.]
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   1. To break or burst, with or without entire separation of
      the parts; as, to crack glass; to crack nuts.
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   2. To rend with grief or pain; to affect deeply with sorrow;
      hence, to disorder; to distract; to craze.
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            O, madam, my old heart is cracked.    --Shak.
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            He thought none poets till their brains were
            cracked.                              --Roscommon.
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   3. To cause to sound suddenly and sharply; to snap; as, to
      crack a whip.
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   4. To utter smartly and sententiously; as, to crack a joke.
      --B. Jonson.
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   5. To cry up; to extol; -- followed by up. [Low]
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   {To crack a bottle}, to open the bottle and drink its
      contents.

   {To crack a crib}, to commit burglary. [Slang]

   {To crack on}, to put on; as, to crack on more sail, or more
      steam. [Colloq.]
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