That means megalomania or having delusions of grandeur.

Also see Lachnummer. That means being a joke or a laughing stock.

Annalena Baerbock: Russia wanted to prevent me from becoming chancellor – German Foreign Minister Annalena Baerbock wants to thwart the US Gaza plans. Talks with partners are underway, she said on “Maischberger” – and emphasized her claim to power within the Greens.