summer melt
n.— «Bryant said that, typically, some students change their minds during the summer. However, he said, he is confident that the university will not lose significant numbers to what he calls “summer melt.”» —“SMU Expects Entering Fall Class To Be ’86 Size” by Connie Pryzant Dallas Morning News (Texas) June 25, 1987. (source: Double-Tongued Dictionary)
Further reading
The admonition Don’t Mess with Texas may sound like a tough guy’s warning, but it started out as an anti-littering slogan more than 40 years ago. In the 1980s, the Texas Department of Transportation launched the campaign to cut roadside litter that...
While hiking in Colorado, Becca from Corinth, Texas, felt what she calls a kind of “pre-emptive nostalgia,” an appreciation sharpened by knowing the beauty would soon be gone. Is there a word for “feeling homesick for a place you haven’t yet left”...