Taxi is a vehicle name pressed into service as a pet name — and it works in that purely ironic, urban-energy kind of way. The kind of name you give a yellow dog in a city apartment, or a cat who always appears the moment you need to be somewhere else. At 31 registry records, the ironic reading is almost certainly what's happening here.
Urban Pet Naming Aesthetic
Taxi belongs to a distinct urban pet naming register: names that reference the built environment rather than nature or mythology. It's the kind of choice that signals a very specific city-dweller personality — someone who finds a dog named Taxi funnier than anyone named Taxi would, which is precisely the joke. A yellow Labrador named Taxi is a full bit.
Sound and Practicality
Two syllables, hard T opening, punchy -ee ending. Taxi calls well in a dog park and is completely unambiguous in spelling. It's also gender-neutral, which works for owners who don't want to sex their pet's name from the start. Compare with Checker or Cab in the transportation-name category — Taxi is by far the most legible.
The Counter-Reading: A One-Note Joke
Taxi is funny once, and then it's just the dog's name. The humor depends on the listener having the same reference and finding it as amusing as you do, which is not guaranteed. For owners who want playful without the one-liner feel, Rocket or Turbo have similar energy with broader resonance.