I guess chuwak was slang started by some smart jobless, frustated guy back in kathmandu....................It first came out of little angles school.....by the dude called rajesh thapa.............who's background goes to darjeeling...............i am sure he derived from somewhere......the word was so catchy that spread like fire............chuwak chuawk yeh maiya chuwak................. by the way mori is beautiful word.......to express wife........it has a arousal meaning as well.........haina mori kina laag maneki, eta aaija naa ta ra ma DhikiChau khelne kya" the latest one used my frens here are tuk tuk for refering gals......... i have beeing calling calls sweety or dear..................they like it...to beautiful nepali gals............muah muah................kisssy kissy yah yah yah