A Stickman Cowboy

A Stickman Cowboy is the 144th enemy encountered in Boss Fights. This appears to be a reference to West of Loathing, a game in which you play as a stickman, wield lots of very silly gear, and one of the perks is literally "Walking Stupid", which makes you perambulate in a variety of ridiculous ways (doing the worm, crab walking, the goofy tilt-walk described here, etc.).