fair-weather person(a person who supports others only when it is easy and convenient to do so; a person who cannot be relied on in situations of hardship or difficulty: I thought Gene would always stick by me, but when I got into trouble, he turned out to be a fair-weather friend.Asaula)
by any stretch(также of the imagination. The phrase sometimes is put in the negative "by no stretch".,: According to Priscilla, Elvis wasn't racist by any stretch. Those who say that he was simply didn't know him. He had lots of friends who were black. • By no stretch can that work be called an opera. -- Это произведение никак нельзя назвать / никак не назовёшь оперой. (Dictionary.com)ART Vancouver)