It's a jinx that renders the victim mute, unless he/she serves the purpose of the jinx and kisses the person that they desire. It's just Harry's luck that he's in love with Draco. HPDM, oneshot, eighth year.

Harry-Draco AU. One-Shot. Non-magic. After an unexpected encounter in a supermarket, Harry’s Christmas takes an interesting turn of events.

HD slashy one-shot. 'The whole great hall was somber, as if someone had died. Or passed gas.'