A person who believes in the ultimate glory and authority of Bismarck and the Kaiser. Knows every lyric of Heil dir im Siegerkranz and stuff like that. Hates communists and the Weimar. Wants to tear Versailles to pieces. The Kingdom of Prussia is the single most glorious state in the Coalition. Is hated by someone whose first name starts with an A and ends with an A, and whose last name starts with an M and ends with an L. Is considered Nazi but hates the Nazis for not restoring Hohenzollerns. Wants Pomerania, Silesia, Danzig and East Prussia back. Is right.
Für Deutschland zu sterben, ist unserm höchste Ehr!

O Deutschland hoch in Ehren, Du heil'ges Land der Treu, sings on while whole class stares at him

CDU: You're a Nazi and we're going to ban you under NetzDG
Kaiserboo: Actually I hate Nazis because they destroyed German culture and directly caused the partition of Germany, as well as disrespecting the Kaiser, being unchivalrous unlike the Second Reich,...
CDU: But you aren't commie?
Kaiserboo: No I hate communists
CDU: *bans*
by DeutschesOstpreußen November 8, 2019
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A subset of wehraboo where instead of the 3rd reich, they worship the german empire. Backs recolonizarion and restoring the empire. Usually just a wehraboo with a imperialist coat of paint. Tends to overlap with facists, colonialists, and general right athoritanrians. 9/10 times not remotely German.
Kaiserboo: Europe shall bow down to the KAISERREICH!Z

Everyone else: Dude, you need to lay off hoi4.
by NoshGilligan April 19, 2023
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That one friend you have that is obsessed with the german empire so much he speaks in a mock german accent, hates anything to the right of Wilhelm II, and wishes germany won the great war.

Logistics of germany winning the first world war aside, they will often get pissed when you mention a shortcoming of the empire, and either deny or outright support actions like chemical weapons being used on civilians or the namibian genocide, usually for some bullshit reason such as "tHE fRenCh diD iT FirsT" or "NaMIbiA wAs A reVolT". Ironicly enough they often wont be german in the slightest and probably played too much hoi4.

This may overlap with being a werhaboo, or in extreme cases, tee-a-boo. While untrue, you would be forgiven for calling them nazis, due to home similar they can be at times, and the fact that one can lead to another.
John: Hello, I'm a kaiserboo!
Abdoul: So you're a nazi.
John: No I just support the namibian genocide and reckless use of chemical warfare in ww2 by the germans.
Abdoul: Are you sure your not a nazi?
John: Yes, I'm a kaiserboo.
by July 7, 2022
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