
I hope a small amount of jest is permitted on the subreddit. Not many know this, but the meme 'Dickbutt' actually originates from the denier of Wáclaw, the Czech-Hungarian king who ruled between 1301 and 1305.
(This is obviously a joke, although the denier is real and bears a striking resemblance to the aforementioned meme.)
It would be unsurprising if King Vencel let out a hearty laugh upon seeing this coin. Medieval kings were much less 'pompous' and 'orderly' than we imagine. They certainly had a sense of humor and much less decorum than our image of a stiff, religious monarch.
Furthermore, Vencel was only 12 years old when he rose to the throne, and the crown was taken from him at 15. This perfectly fits into the 9GAG/4chan demographic, too. Chroniclers described him as a 'reveler and a rake' who spent more time drinking and partying than ruling the realm. Medieval humor was quite crude, raunchy, and earthy, from nobles to serfs alike.