gravy time
n.— «Harrington said the regular drivers complain constantly because the part-time drivers come on the street during the rush hours, called “gravy time,” which run from 7 to 9 a.m. and 4 to 7 p.m.» —“Part-Time Cabbies Face Legal Barrier” by Jean Reiff Washington Post (M3) Sept. 29, 1946. (source: Double-Tongued Dictionary)
Further reading
Katie in Everett, Washington, is curious about the expression If ifs and ands were pots and pans, there’d be no need for tinkers. What is a tinker? She heard this phrase on the television series The Gilded Age, in response to a character who...