No, one can mock or insult the President with impunity. The First Amendment applies here. It should be noted that in the 1790s, the Federalist-controlled Congress passed the Sedition Act which made criticizing the President or Congress a crime.
Polycystic kidney disease (also called PKD) causes numerous cysts to grow in the kidneys. These cysts are filled with fluid. If too many cysts grow or if they get too big, the kidneys can become damaged.
xkcd, sometimes stylized as XKCD, is a webcomic created by Randall Munroe.The comic's tagline describes it as a A webcomic of romance, sarcasm, math, and language. Munroe states on the comic's website that the name of the comic is not an acronym but just a word with no phonetic pronunciation.kcd was also voted Best Comic Strip by readers in the 2007 Weblog Awards and 2008 Weblog Awards. It was also nominated for a 2009 NewNowNext Award in the category 'OMFG Internet Award'. Randall Munroe was nominated for the Hugo Award for Best Fan Artist in both 2011 and 2012.