Phteven is an internet sensation featuring Tuna, a Chiweenie with a distinct recessed jaw and prominent overbite. The name originated from a viral Reddit post about a man named Steven whose name was misspelled as 'Phteven' at Starbucks after he specified it was spelled with a 'ph.' When internet users paired this name with Tuna's awkward, toothy expression, a legend was born. The meme typically involves replacing 's' sounds with 'ph' or 'th' to simulate a lisp, turning Tuna into a character that embodies social awkwardness and pure, goofy charm. It remains a staple of animal-based internet humor, celebrating the unique looks of our four-legged friends.