Loved the HK comedian who featured in a little video of simple Cantonese or Wongtongua (Translit?)
Simple 'Thank you' : 'M'goi'
'Big thank you' for, e.g., present: 'Dorchay'
"But you rarely have to say this because HK people hardly ever give you something for nothing and if they do, you so surprised you need door to lean on and chair to sit in - door-chair!"
NB, Before the Tsim sha tsui Tong came after me: his words, not mine