With a bit of imagination the shape of the boundaries of Thailand resemble an elephant, with the long southern part on the Malay peninsula to for the trunk. I remember to have seen cartoon maps playing with exactly that image, especially as the elephant is such a symbolic animal for Thailand - it was present on the old flag before 1917, and the white elephant is still a royal symbol.
Strangely, it seems my memory is playing tricks on me. I believed to have seen several such maps in Thongchakul Winichakul book Siam Mapped, but when I now checked it to scan the best ones to show here, I noticed that in fact it has just a single one, and not quite like the one I had in mind.
Sadly no citation for that drawing is given, it must have been published in Thai media since it has Thai characters all around. Also it is not dated, yet the topic of Thailand being threatened by the spread of communism into the neighboring Laos, Vietnam and Cambodia suggest it should be from the second half of the 1970s, after South Vietnam fell, the Khmer Rouge overtook Cambodia, and the communist insurgents in Thailand were at its high following the return to military rule in 1976. The reproduction is to much blurred, so I cannot make out the Thai letters - in Siam Mapped it is titled "Wake up, Thai people".
The artful map I had in mind more similar to those maps of Europe during World War I, or the Japanese map of Asia, both found on the bibliodyssey blog. As I cannot find them in any of my books, it must have been a website where I saw them, but seems like I did not bookmark it then.
But to add a contemporary example - 2bangkok.com often features the Kao Lao political cartoons from the newspaper Matichon (มติชน), and at the height of the Preah Viharn crisis it showed the caricature to the right which shows Thailand biting a chunk out of Cambodia. I have cut out the relevant part, the whole one can still be seen in the 2bangkok archive. The text ถูกสอน ให้คลั่งชาติ ตั้งแต่เด็ก translates to Being taught to be a nationalist from childhood.