DCHP-1 Online
horse collar Slang 
a clerical collar.
- 1958 I found that out when he got into conversation with the passenger in the chair across the aisle, opposite, who was a clergyman, as could be seen from his horse collar.
- 1958 I found that out when he got into conversation with the passenger in the chair across the aisle, opposite, who was a clergyman, as could be seen from his horse collar.