Someone who goes vegan but hasn't learned what nutrition is, so they eat almost only vegetables. Usually gives up veganism after a month and tells everyone they could never do it.
Whether well-meaning or looking for attention, salad vegans usually give up veganism after a month of starvation, having consumed neither protein nor fat nor a nutritional recommendation, but with prolonged brain degeneration due to lack of vitamin B12, some go on to become the crazy neighbor next door.