An annoying person in these two ways? (2-3-2)
I believe the answer is:
so-and-so
'an annoying person' is the definition.
'so-and-so' can be an answer for 'person'. I'm not sure about the 'an annoying' bit.
I can't explain the remainder of the clue.
(Other definitions for so-and-so that I've seen before include "Right little rascal!" , "Disfavoured person" , "Difficult person - nobody in particular" , "Person unspecified or abjured" , "No sodas for this unpleasant person" .)