Definition from Wiktionary, the free dictionary
10.0 (plural 10.0s)
- (figuratively) perfection (on a literal or metaphorical scale of 0-10, where 10 is the qualitatively the best outcome); a perfect specimen, especially one who is physically attractive
2013, "Pete", The Mexican Fisherman, page 45:
- Shooting stars, meteors, and bizarre occurrences were commonplace. Tonight, however, was a 10.0 on my weird shit-o-meter.