From Longman Dictionary of Contemporary Englishchew something ↔ over phrasal verbTHINK ABOUTto think carefully about something for a period of time Let me chew it over for a few days. → chew→ See Verb table
Examples from the Corpus
chew over• Sincerely, it is more in than chewing gun.• And the band cooks and splutters, pistons and relaxes, chews things over and lets them ride.• Amelia was chewing it over, undecided. 