[He thinks about the hand gesture for a moment, he's old all right? Normally it's a high-five! But after a few seconds he figures out how to give a teeny fist bump with a small laugh.]

That makes you one of the First Mate club then! You can tell Ray-Ray Silvers if you ever meet him.

It is our sol-em-n duty to uphold making sure that when our captains are out picking up chicks or getting in trouble that the rest of the crew doesn't do anything dumb like they are wont to do. [This speech would have more oomph if he wasn't tiny as heck. Also if he didn't think this meant that his Pops goes out and collects baby chickens. Young bishie Whitebeard was obviously a chick magnet.]