Royce was coming home from school,  barged into the house without washing his legs.  I was resorted to using this method, 'I am going to sell you to garang guni'. 

He went to wash his legs instantly but barged in to kitchen and whined for his Milo drink before dinner. 

I was angry but his behaviour and told him again, I am selling you to garang guni. When he came out , he was angry with me scolding him, he yelled the exact same words to my face.

The kids , they do learn fast......