This "Xavier Guy" is a controversial internet character known for making unfunny and often cringeworthy jokes. This meme originated as a copycat of the popular Pakalu Papito account, which was famous for its humorous and irreverent tweets. However, Xavier's jokes are generally considered to be of lower quality and less witty, leading to widespread dislike

Basically: Some random ass guy on the internet who stole an innocent man's face as his PFP and make shitty ass unfunny jokes on the internet.