Two notes for what's-his-name (2-3-2)
I believe the answer is:
so-and-so
I believe this is a double definition.
'two notes' is the first definition.
(I've seen this before)
'what's-his-name' is the second definition.
(I've seen this before)
'for' is the link.
(Other definitions for so-and-so that I've seen before include "Right little rascal!" , "Disliked person" , "Difficult person - nobody in particular" , "Person unspecified or abjured" , "Someone or other - unpleasant person!" .)