Somebody quiet bores intolerant individual (3,4)

I believe the answer is:
big shot
'somebody' is the definition.
(I've seen this before)
'quiet bores intolerant individual' is the wordplay.
'quiet' becomes 'sh' ('sh' is used to tell someone to be quiet).
'bores' indicates putting letters inside (bore can mean to drill into).
'intolerant individual' becomes 'bigot' (I can't explain this - if you can you should believe this answer much more).
'sh' inserted within 'bigot' is 'BIG SHOT'.
Can you help me to learn more?
(Other definitions for big shot that I've seen before include "VIP, informally" , "Important influential person" , "Colloquially a very important person - quite noisy" , "Important man with loud gun?" , "Important person (with a large cannon?)" .)
