Similar to that of a Weeaboo, but obsessed with China instead of Japan.
"Ever since he's discovered Jackie Chan, he's really become a total Xiaboo."
An adamant fan, defender, or apologist of the Chinese government
Xi (as in Xi Jinping) + -aboo (as in Weeaboo) = Xiaboo
There’s a lot of Xiaboos online these days, they should spend a month in China to see how it really is