n. — Food & Drink
an alcoholic drink with the main ingredients Clamato juice (tomato juice and clam juice) and vodka, mixed with spices (see Image 1).
Type: 1. Origin — First attested in the 1973 quotation on a Toronto eatery from The Globe and Mail, the drink is supposedly a Calgary invention. Reportedly invented by a Walter Chell, there is dispute as to its precise origins (see the 1988 Vancouver Sun quotation and the 2009 quotation). The term is uncommon in non-Canadian sources and, if used, it is usually as a Canadian reference. Chart 1 reveals that Bloody Caesars have some currency in the UK. Over the course of the late 20th century, Caesar became the prevalent form, ousting original forms (bloody Caesar) that were formed by analogy to the drink Bloody Mary. The drink, which is often served with a stick of celery and flavoured salt along the rim of the glass, is also available without alcohol; see, for example, the second 1988 quotation for an explanation.
Images:

Image 1: A Caesar (without celery stick). Source: Wikimedia Commons. Author: R. Love 
Chart 1: Internet Domain Search, 10 Sep. 2013