If the Bradley Effect refers specifically to an election featuring a black candidate, what's the name for the similar 'effect' for an election featuring a rapist candidate?
The berlusocni bunga
Speaking of Berlusconi, polls and exit polls greatly underestimated his support both in the 2006 and 2013 General Elections, which is respectively before and well after the various accusations (never of rape, though) came out.
In the 2009 European Elections, which were right after the sex scandals broke out, his party actually underperformed polls by about 4-5%.