Definition of "crop up"

crop up

verb
third-person singular simple present crops up, present participle cropping up, simple past and past participle cropped up
1. (intransitive, idiomatic) To occur, especially suddenly or unexpectedly.
  Quotations
  Cares crop up in villas.
  1880, [Benjamin Disraeli], Endymion […], volumes (please specify |volume=I to III), London: Longmans, Green, and Co.
  The potential for conflicts cropped up immediately. In April 2012, after her maternity leave and while she was waiting to get her S.G.E. designation, Teneo asked her to intercede on behalf of its client Judith Rodin, the president of the Rockefeller Foundation, in obtaining a seat on the President’s Global Development Council.
  2016 January 31, “Is Huma Abedin Hillary Clinton’s Secret Weapon or Her Next Big Problem?”, in Vanity Fair, retrieved 21 January 2016