stamp collecting

/S T AE1 M P K AH0 L EH1 K T IH0 NG/
noun
  1. 1

    The hobby of collecting and displaying postage stamps and related items.

  2. 2

    (usually derogatory) Collection of items or information of no intrinsic value.

Synonyms

Source: https://en.wiktionary.org/wiki/stamp%20collecting