pick someone’s brain (about something)

pick someone’s brain(s) about something (informal)

= to ask someone questions because you want them to give you advice or information; to ask somebody a lot of questions about something because they know more about the subject than you do

= (попросити когось) поламати/сушити голову над чимось

RELATED: to rack one’s brains over something = поламати/сушити (свою) голову над чимось