Broadcast by deerstalker who cares?
I believe the answer is:
so what
'who cares?' is the definition.
(I've seen this before)
'broadcast by deerstalker' is the wordplay.
'broadcast' becomes 'sow' (sowing is a kind of broadcasting).
'by deerstalker' becomes 'hat' (I can't explain this - if you can you should believe this answer much more).
'sow'+'hat'='SO WHAT'
Can you help me to learn more?
(Other definitions for so what that I've seen before include "Does it make any difference" , "Expresses contempt or lack of interest" , "Does it matter?" , "It's unimportant, right?" , "I'm not interested" .)