Exhausted -- everybody, on the whole (3,2,3)
I believe the answer is:
all in all
'on the whole' is the definition.
(synonyms)
'exhausted everybody' is the wordplay.
'exhausted' becomes 'all in' ('all in' can mean exhausted).
'everybody' becomes 'all' (I've seen this before).
'allin'+'all'='ALL IN ALL'
(Other definitions for all in all that I've seen before include "Taken as a whole, everything considered" , "in summary" , "As a whole, considering everything" , "Taking everything into consideration" .)