Tuk Tuk is the way Thais and visitors in Thailand call the auto-rickshaw which is easy to find anywhere in Thailand for hire. The locals also call it ‘Sam Lor’ (meaning three-wheeler). The fare is negotiable and usually more expensive than the standard taxis.
For hobbyists and artists, Tuk tuk is also an object to implement their artistic ideas. I have seen a Tuk tuk with many thousands of jewels and crystals. This is a limo/stretched version. I’m not sure if it is usable in reality though.