Post something (image, saying, video) that warms your cockles. (HEY! I don't wanna know what you do with your cockles!) ....A cockle is a heart valve. (Oh.) From Star Trek TNG, "The Wounded." A rogue Federation captain and veteran of a war with the Cardassians cannot let go of his hate and his actions nearly bring the Federation and the Cardassians into another conflict. It takes the everyman, Miles O'Brien, and an Irish marching ballad to snap him out of it.