dob in

verb dobs, dobbing or dobbed (adverb) Australian and NZ informal

(tr) to inform against or report, esp to the police
to contribute to a fund for a specific purpose

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012