A certain breed of dog having short legs and a long trunk, including standard-sized, miniature (smooth-haired, long-haired, and short-haired) varieties.
mong
noun
A mongrel dog.
A mingling, mixture, or crowd.
A muddle or confusion.
A stupid person.
How often have the words dachshund and mong occurred in a corpus of books? (source: Google Ngram Viewer )