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2.
similar to being pussy whipped, except that it suggests a more intense and extreme state of bondage.

other forms: clam shackle, clam shackles, clam shackler, clam shackling, clam shacklist, clam shakleteur.
"not just pussy whipped, but downright clam shackled!"
by ravenflesh June 24, 2008
 
1.
the female equivalent of a "cock block".
I can't believe that girl just clam shackled me!
by Kim Campbell March 13, 2011