to drink large volumes of liquid in a deep squat position; typically, said liquid has significant force or pressure (examples: fire hose or hydrant, display fountains, geysers); the deep squat is needed to lower the center of gravity and handle the volume and force; no guarantee the human body can handle a squat chug
Risa doesn't always drink water. But when she does, she squat chugs a geyser.
Chin chugging is the act of chugging a beer with no hands. To do so one must poke a hole in the bottom of a can and open the top (shot gun style), and bite the rim of the can to hold it in place while you tip your head back and down it all as fast as possible similar to a beer bong.