Definition 1 of 1
\tan-ta-tan or dan-da-dan or any combination of t/d\
Vocal equivalent of a drumroll.
Origin: Onomatopoeia of a sound sequence commonly used to announce the presence of a villain or hero in Bollywood.
... and then tan-ta-tan, there appeared Amitabh, and let's just say there was a lot of dishoom dishoom.
Added 2011-07-20 by thewanderingv