The Collaborative International Dictionary of English v.0.48:

Poke \Poke\, v. t. [imp. & p. p. Poked; p. pr. & vb. n.
   Poking.] [Cf. LG. poken to prick, pierce, thrust, pok a
   dagger, knife, D. pook, G. pocken to beat, also Ir. poc a
   blow, Gael. puc to push.]
   1. To thrust or push against or into with anything pointed;
      hence, to stir up; to excite; as, to poke a fire.
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            He poked John, and said "Sleepest thou ?" --Chaucer.
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   2. To thrust with the horns; to gore.
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   3. [From 5th Poke, 3.] To put a poke on; as, to poke an ox.
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   To poke fun, to excite fun; to joke; to jest. [Colloq.]

   To poke fun at, to make a butt of; to ridicule. [Colloq.]
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