Definition of "phosphate"
(US, regional, dated) A carbonated soft drink containing phosphoric acid, often flavored with a fruit-based syrup.
Quotations
“This man here,” she said, “can make you a cherry Coke or a chocolate Coke or a phosphate — a chocolate phosphate or. “Vanilla phosphate,” the man helped, “cherry phosphate, orange phosphate, lime phosphate, lemon phosphate,
2002, Michael Raleigh, In the castle of the Flynns, page 180
You order California burgers for us both, even though I don't eat lettuce or tomato, then you order me a phosphate, cherry, a dreadful fizzy drink you say you always loved. It's bitter, bubbly, unbearable; but, thirsty for your past, force myself to drink it.
2008, Kathryn Kysar, Riding shotgun: women write about their mothers, page 106
verb
third-person singular simple present phosphates, present participle phosphating, simple past and past participle phosphated