"Whatevs" (3)
I believe the answer is:
meh
'whatevs' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for meh that I've seen before include "expression of indifference" , "Unexciting (modern slang)" , "Not much cop" , "Who cares" , "am I bovvered?" .)