fall in with

verb3

1. •
   To join (a group of people).

   • He has fallen in with a bad lot.
2. •
   To accept, abide by (a set of generally agreed rules, or a suggestion).

   • It seemed like a good idea, so we fell in with it.
3. •
   To meet with (something).

   • We had not sailed twelve hours before we fell in with a gale, which lasted several days, and we kept under close-reef-topsails and storm-staysails. — 1846