Parkinson's Law Par‧kin‧son's Law [ˌpɑːkɪnsnz ˈlɔː ǁ ˌpɑːrkɪnsnz ˈlɒː] noun HUMAN RESOURCES US noun [S] HUMOROUS
► the idea that work always increases to fill the time available for finishing it: »
A variant of Parkinson's Law says that the quantity of emails you receive rises to meet the time you set aside to read them.
Financial and business terms. 2012.