Hawker stores in Singapore are required by Ministry ofHealth(MOH)
to put out their grading in front of their stores. The gradesare:

A - very very clean and hygienic
B - clean & hygienic
C - aversely clean & hygienic
D - Poor

However, some people cannot understand English properly and decided
to come up with a simpler version of the grades:
A - A sai (means can lah)
B - Buay Pai (means not bad lah)
C - Car na sai (means like shit)
D - Dua Lau Sai (means Diarrhoea)