A World of Tanks slang term used to describe a certain type of unsavory history noob.
The word was invented by World of Tanks Forum user BabyOlifant in January of 2012 and first appeared on the Internet in his thread “The Great Anti German Tank Conspiracy” in March 2012.
It was eventually imported to AH.com in early 2014. The word is a paraphrase of the existing slang term Weeaboo (i.e. mindless admirer of all things Japanese and anime - but only the romanticised stuff, not the real thing), a Wehraboo is a history or alternate history fan (including an AH.commer) that is firmly entrenched in the belief that Nazi Germany's Wehrmacht was the best military in history, without a single flaw. Effectively, a Wehraboo is any obsessive Wehrmacht fanboy/fangirl who doesn't like historical facts getting in the way of his militaristic fantasies. While not necessarily, many Wehraboos can become Nazi apologists (which is obviously frowned upon on AH.com and gets you banned in short order). The cliché of German Techwank can be a common fetish for many Wehraboos. When identifying wehraboos in the wild, the Wehrabingo card is a handy tool.
A common argumentative tactic of wehraboos is to demonize their opponents as agents of a greater communist conspiracy, Vladimir Putin, or Joseph Stalin himself.
Third Reich - General article on the portrayal of Nazi Germany in the alternate history genre.