captain's pick

have a bone to pick

To have a complaint or grievance (with somebody); to have a contentious issue to discuss.

pick apart

To review or analyse in great detail

pick at

To touch, grab, handle, or pull tentatively or gingerly, using a utensil or one's fingers.

pick corners

To choose a preference (as in predicting which boxer will win a match).

pick holes

To find weaknesses, errors or imperfections (in).

pick of the litter

The best person or item in a group; the best that one has to offer.

pick on someone your own size

An admonition of cowardice, usually said to make someone cease harassing or bullying someone else, especially where the bullied party is physically smaller or weaker than the bully.

pick one's battles

To involve oneself in disputes only if one is likely to win.