goose egg

1. Zero, especially when written as a numeral to indicate that no points have been scored.
2. A swelling or lump, especially one caused by being struck.

Zero, nothing, especially a score of zero. For example, Our team did badly, earning goose egg, or My income from writing this year was goose egg. This expression is an Americanization of the earlier British duck's egg. [Mid-1800s]

The noun has one meaning:

Meaning #1: a quantity of no importance
  Synonyms: nothing, nil, nix, nada, null, aught, cipher, cypher, naught, zero, zilch, zip