picked the brains of (Meaning)

a filling thread, a small thin piece of metal or plastic used to pluck a stringed instrument, to pluck with a pick or with the fingers, a throw of the shuttle, a small thin piece (as of plastic or metal) used to pluck the strings of a stringed instrument, to single out for a particular purpose or for special attention, to dig into, to remove covering or adhering matter from, to throw or thrust with effort, select entry 1, choose, to start (a fight) with someone else deliberately, to loosen or pull apart with a sharp point, to criticize repeatedly especially for minor faults, to gather by plucking, a screen in basketball, the act or privilege of choosing or selecting, the best or choicest one or portion, pilfer, rob, an intercepted forward pass, picklock, a heavy tool with a wooden handle and a blade pointed at one or both ends used especially to loosen or break up soil or rock, the best or choicest one, to eat sparingly or mincingly, the act or opportunity of choosing, to throw (a shuttle) across the loom, to use or work with a pick, something thrown, to remove matter from bit by bit by or as if by plucking, to unlock with a device (such as a wire) other than the key, to remove bit by bit, choose, select, to select with care and deliberation, a blow or stroke with a pointed instrument, to gather or harvest something by plucking, to make (one's way) slowly and carefully, a comb with long widely spaced teeth used to give height to a hairstyle, provoke, a comb with long widely spaced teeth used in grooming hair, to dig at or into, one of the points on the forepart of the blade of a skate used in figure skating, to single out for criticism, teasing, or bullying, to obtain useful information from by questioning, to steal or pilfer from, a slender pointed instrument, one that is picked, to pluck (a stringed instrument, such as a guitar) with a pick or with the fingers, a heavy, usually long-handled iron or steel tool pointed at one or both ends compare mattock, pilfer, to eat sparingly or in a finicky manner, to pierce, penetrate, or break up with a pointed instrument, toothpick, the portion of a crop gathered at one time, to strike, pierce, or break up with a pointed tool, to unlock without a key, the act of pitching or throwing