I ran into this poetic expression when my literature teacher quoted [Walt Whitman](http://www.yourdailypoem.com/listpoem.jsp?poem_id=856),

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> I depart as air—I shake my white locks at the runaway sun;
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> I effuse my flesh in eddies, and drift it in **lacy jags**.
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According to Dictionary.com, 'jag' has the meaning of 'a load, as of hay or wood'. So here 'lacy jags' means 'wood with laces'? I'm confused.