Grass weeding tool picked up? Oh well (5-2)
I believe the answer is:
heigh-ho
(Other definitions for heigh-ho that I've seen before include "Exclamation of weariness" , "Tired expression" , "Weary expression" , "''... ... it's home from work we go'' (Snow White and the 7 Dwarfs)" , "Gosh, I'm tired!" .)