Have you had a Victor Meldrew moment? Have muttered under your breathe about the rubbishness of something? Did you come out with one of the many cliches - "They don't know they're alive", "In my day....", "What is the world coming to?" etc
If so, list them here ( so that the rest of us can laugh at you
). If you under the age of 36, you may apply for honourary membership of the Grumpy Club, but your initiation will be posting a convincing Grumpy Old... message.