watermelancholy 

feeling sad, sorrowful, and/or depressed.

Today I am feeling watermelancholy because I got hit by a large truck carrying oranges.

watermelancholy by melinda jeanene May 4, 2008

watermelancholy 

the deep, mournful summertime sorrow that only bad watermelon can bring.

Yo, I thought that watermelon would be dank as hell, but it tasted like a straight-up toot! My head ain't right—I'm feeling some real watermelancholy right now . . .

watermelancholy by Penny Gremlin October 30, 2011