hammer-in
n.— «Mr. Moran was stricken by cancer a number of years ago and it came back last August, Mr. Hendrickson said. “He was pretty brave about it,” and was able to travel in October to Arkansas for a knife “hammer-in” as the event is called.» —“Bill Moran dies at age 80″ by Nancy Luse Frederick News-Post (Md.) Feb. 13, 2006. (source: Double-Tongued Dictionary)