the.com/zing

means A lively, piquant quality — a dash of energy, flavor, or excitement that makes something snap instead of sit flat.

from Almost certainly imitative — a bit of sound-mimicry coined to capture the quick, bright whizz of something zipping past or the sharp tang of a flavor. It surfaces in English as slang around the early 20th century, first describing vim and vigor in a person or performance, then spreading to food, drinks, and writing. No deeper root behind it — it's onomatopoeia doing what onomatopoeia does best: sounding exactly like the thing it means.