Fog

BIGAMIST: A heavy fog in Italy.

Politics

Politics - Poli = Many , 

Tics = Blood sucking parasites

Old musicians

Old musicians never die. 

They just decompose

Bad tempered

What's round and bad-tempered?

A vicious circle.

Red Indians

How do we know the Red Indians were the first people in North America? 

They had reservations.

Girls night out

I went on a girls' night out recently.

The invitation said 'dress to kill'. 

I went as Rose West.