Crossword Genius

"What a lousy play!" (3)

Ross

I believe the answer is:

boo

(Other definitions for boo that I've seen before include "Cry that shocks" , "Negative reaction" , "Frightening word (for a goose?)" , "Sound expressing disapproval" , "Exclamation to startle" .)

I've seen this clue in the LA Times.
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