Crickets are commonly built on the uphill side of chimneys.
In 1940 Disney released the animated film, “Pinocchio”. One of the characters was a grasshopper that rode around on Pinocchio’s shoulder and acted as his conscience. The grasshopper’s name was Jiminy Cricket.
So we have a construction term used and accepted all across North America that comes from a minor joke about a character in an animated Disney film from over 75 years ago.