The story
From Kroger + -ing. From a marketing campaign by The Kroger Company that featured the jingle "Let's Go Krogering!" https://books.google.com/books?id=2DaFZGPDdfwC&pg=PA28
Etymology from Wiktionary, CC BY-SA 4.0.
Krogering
Today it means: Shopping at a Kroger store. Full definition →