mullock

from The Collaborative International Dictionary of English v.0.48

Mullock \Mul"lock\, n. [From {Mull} dirt: cf. Scot. mulloch,
   mulock, crumb. [root]108.]
   Rubbish; refuse; dirt. [Obs.]
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         All this mullok [was] in a sieve ythrowe. --Chaucer.
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