A fair weather friend is one who lives in a milder climate than you. This person takes great pleasure in taunting you with how great it is where they are (warm and sunny) when you are suffering in your climate (cold and snowy or otherwise unpleasant).
Shane was taunted by his fair weather friends on Facebook as he sat looking helplessly from his office window, watching snow fall in the middle of April in Michigan.
by tweetlady April 19, 2011
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Ted Cruz.

From Wikipedia:
In February 2021, during a historic winter storm, up to 4.3 million Texas residents were left without power and millions of others without drinking water. In the middle of the storm, Cruz and his family were spotted on a plane heading to Cancún, Mexico, where they planned to stay at the Ritz Carlton and escape their home, which Heidi Cruz called in a text message "FREEZING".198199200 Cruz requested assistance from the Houston Police to escort him and his family through the airport.201
Reporters outside the Cruz family home also observed that Cruz had left the family poodle Snowflake alone inside the house without heat. The dog was spotted through the window of the front door of the dark and empty house.202 One reporter who visited the house spoke to a self-identified security guard who said he was caring for the dog.203 Cruz's political allies and rivals condemned him for leaving Texas during a crisis and traveling internationally during the COVID-19 pandemic.198 Cruz initially said he was taking his daughters on a weeklong vacation from school at their request, in an attempt to be a "good dad".204 Later that day, he returned to Texas and said the vacation was a mistake.205 Protesters calling for his resignation greeted him in front of his house upon his return.206
Ted Cruz is such a fair-weather friend: The moment Texas froze over, he abandoned his constituents and ran to Mexico.
by Hard_Landings February 22, 2021
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One with whom you share quality time only when you each have something mutual to bitch about, and the rest of the time you have little in common to talk about.
Mike's a good ill weather friend. I was home late last night because we spent half an hour bitching about the boss, even though most of the time we don't really have a whole lot in common.
by Altreus September 12, 2010
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