casting vote 
noun
An extra vote given by a chairperson to decide an issue when the votes on each side are equal.The second thing I want to talk about is the meeting issue and the casting vote....
- His troubles within the organisation culminated in 1930, when he had to rely on his own vote and the casting vote of the national secretary to survive.
- A casting vote of the Chairman decided the issue.
Origin
Early 17th century: from an obsolete sense of cast 'turn the scale'.
- more than somewhat
- Moreton Bay
- Moreton Bay bug
- Moreton Bay chestnut
- Moreton Bay fig
- Moreton Bay pine
- more —— than one can shake a stick at
- more —— than someone has had hot dinners
- morfrey
- morg
- Morgagni
- Morgagnian
- Morgagni hernia
- Morgagni's hernia
- Morgagni's syndrome
- Morgagni syndrome
- Morgan
- morganatic
- morganatically
- Morganisation
- Morganism
- Morganist
- morganite
- Morganization
- Morgan, J. P.