What is the meaning of xx in texting?

Read also:

• What is the nastiest thing you had your wife do and she loved it?
• Watch an asteroid the size of an aircraft carrier make a close pass of Earth on June 5 - Space
• Why do Trump supporters believe Trump should deport the immigrants? These people you call "illegal immigrants" have lived here for many years, they have houses, jobs, how can you think they will just go back to their country, where they have nothing?
• Here's Where Traders Expect Broadcom Stock to Go After Earnings - Investopedia
• Top NHL free agent forwards: Marner, Ehlers, Boeser likely available - NHL.com
• Urgent warning issued for US consumers after ‘security breach’ of 184,000,000 passwords — here’s who’s exposed - Yahoo
• What is the reason for writing X^2 as XX instead of X*X?
• Michaels buys Joann brand, plans to expand crafting supply to meet demand - ABC News
• Killer Inn is Square Enix’s new ‘murder mystery action’ game - The Verge
• Iusto et ipsum nesciunt est qui.