make (one’s) bones
v.— «Shah is a 41-year-old publisher of small provincial newspapers who made his bones after winning a bitter strike against the unions that tried to shut down his northern England operation when he brought in computers and offset presses three years ago.» —“Murdoch Challenging British Unions” by Timothy Harper Dallas Morning News (Texas) Feb. 24, 1986. (source: Double-Tongued Dictionary)
Further reading
The admonition Don’t Mess with Texas may sound like a tough guy’s warning, but it started out as an anti-littering slogan more than 40 years ago. In the 1980s, the Texas Department of Transportation launched the campaign to cut roadside litter that...
In one episode of The Great Pottery Throwdown, a soothing British reality show that features amateur ceramicists, someone jokes about spending a night on the tiles. In this case, the phrase has nothing to do with crafting tiles from clay. A night on...