What's the difference between chapfallen and chopfallen?

Chapfallen

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Definition:

• (a.) Having the lower chap or jaw drooping, -- an indication of humiliation and dejection; crestfallen; discouraged. See Chopfallen.

Example Sentences:

Chopfallen

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Definition:

• (a.) Having the lower chop or jaw depressed; hence, crestfallen; dejected; dispirited; downcast. See Chapfallen.

Example Sentences: