English definition of “dip into sth”
dip into sth — Phrasal Verb with dip
/dɪp/ verb (present participle dipping, past tense and past participle dipped)
READ UK › to read small parts of a book or magazine: It's the sort of book you can dip into now and then.
SPEND › to spend part of a supply of money that you have been keeping: I had to dip into my savings to pay for the repairs.