Kathe can only be used at the end of a sentence, or after a word/phrase you choose to mock.
It is pronounced as cu(as in cu-p) th(as in fai-th) ey(as in h-ey)
How's the cow kathe?(A very curious "How has the cow been?")
I milked the cow this morning
- Milked the cow kathe! (Milked the cow she says. *snort*)