From a reddit post in r/dogecoin subreddit:

"With so many new shibes pouring in, I feel it's important to explain it quickly.

Dogecoin is one of the oldest cryptos out there. Due to its silly front, however, it attracted a different kind of community than bitcoin and the like over time. We focus on helping out where we can and keeping a positive attitude.

So when we say 1 Doge=1 Doge, it's an easy reminder that market prices may change, but what we accomplish as a community remains."

Link: https://www.reddit.com/r/dogecoin/comments/7pdnmv/the_meaning_of_1_doge1_doge/