did one's bit

Verb

do one's bit (third-person singular simple present does one's bit, present participle doing one's bit, simple past did one's bit, past participle done one's bit)

1. (informal) To make an individual contribution toward an overall effort.
   • Soon we were climbing through New Mills and Foxhall, both of which are closed entirely, their buildings doing their bit to ease the housing problem, and Kilmacrenan was reached at four o'clock.1949 November and December, K. Longbottom, “By Goods Train to Gweedore”, in Railway Magazine, page 355

   Synonyms:

   do one's part, do one's fair share