el quinceañero, la quinceañera - specifically, a 15-year-old, or, more generally, a teenagerSpanish example: El cine sobre quinceañeros no es exclusivo de los yanquis.
English example: Teen movies aren't exclusively an American phenomenon. (Literally, cinema about teenagers is not exclusively of the Yankees.)
Source: el quinceañero, la quinceañera - specifically, a 15-year-old, or, more generally, a teenager (https://www.123teachme.com/spanish_feeds/word_of_the_day/2020/7/9)
That's a bit of a tongue twister, even without a mouthful of ulcers....
Pity there is no indication of pronunciation...
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quinceañera (https://www.spanishdict.com/pronunciation/quincea%C3%B1era)
:tiphat: