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a mass of fecal matter which has been disguised as a lobster by means of inserting

discarded body parts of an actual lobster (antennae, legs, etc).

To enhance the illusion, lobsturds are typically positioned in areas that are frequented by
actual lobsters, such as in crevices, underneath rocks, etc. The ultimate goal of these efforts
is to trick a would-be lobster hunter into touching poo
After retrieving what he thought was a lobster from his net, Pablo realized that what he was holding was in fact a lobsturd.

"DOODIE!!!", he exclaimed.
by Boxer Bones September 21, 2009
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