stair-casing
n.— «The benefits of shared ownership schemes are…You can increase your share as time goes by, a process known as stair-casing.» —“How to get on the housing ladder” by Helen Adams BBC News May 1, 2007. (source: Double-Tongued Dictionary)
Further reading
Mike in Glasgow, Kentucky, wonders about a catchphrase used in British comedies: I go to the foot of the stairs. The Oxford Dictionary of Catchphrases (Amazon) compiled by Anna Farkas and several books by catchphrase collector Nigel Rees both point...
Teen slang from the South, and food words that are tricky to pronounce. • High schoolers in Huntsville, Alabama, told Martha and Grant about their slang, including a term particular to their hometown. • How do you pronounce the name of that tasty...