Learning Singlish!
Why you so liddat?
'Why you so liddat?' is actually 'why're you so like that?' in English. This is how Singaporean express dismay at their peers. It's something like 'how could you?' or 'why are you behaving like this?'. The phrase is so popular that it's even been made into a song.
Example: Mum: "You must reach home before 11pm, or else I will lock the door"; Son: "But that's so early, why you so liddat?"