definition of
dud

[1] #1 dud n. [flop, washout] someone who is unsuccessful. wn

[2] #2 dud n. [misfire] an explosion that fails to occur. wn

[3] #3 dud n. [turkey, bomb] an event that fails badly or is totally ineffectual; "the first experiment was a real turkey"; "the meeting was a dud as far as new business was concerned". wn