Ka Ni Na
A dirty phrase from Singapore that means 'fuck your mom's stinky vagina', it's like the ultimate insult when you're really mad.
My cousin used 'ka ni na bei chao chee bye' when my dog peed on his shoes.
My friend's dad said it when my friend broke his phone.
I texted my brother 'ka ni na bei chao chee bye' because he stole my snacks.