Wiktionary
blue bonnets
n. (blue bonnet English)
Wikipedia
Blue Bonnets (raceway)
Blue Bonnets Raceway (later named Hippodrome de Montréal) is an abandoned horse racing track and casino in Montreal, Canada. After 137 years of operation, it closed in October 2009 and left in a derelict state ever since.
Usage examples of "blue bonnets".
All the blue bonnets are over the border, and next thing you know, it's lances and swords all over the Haughs of Cromdale.
Last week the blue bonnets at the UN really botched one up big-time.