The phrase "has dubbed himself" is correct and usable in written English.
It can be used when someone has given themselves a nickname or title.
Example: "He has dubbed himself the 'King of Comedy' after his latest stand-up special."
Alternatives: "has named himself" or "has referred to himself as".
Not to be outdone, the ubiquitous entrepreneur and sometime rapper Sean Combs has dubbed himself "the black Sinatra"; still another rapper has taken the phrase as his very own nom de hip-hop.
Mr. Hooda said his surname's similarity to HUDA, or the Haryana Urban Development Authority, a state administrative body, has often amused people, so he has dubbed himself the "Haryana Overall Development Authority".
In addition to his "Executioner" tag, Hopkins has dubbed himself The Southpaw Assassin as his precise right-hand punches and hurtful left hooks mean he can boast of never having lost to a port-sider like Calzaghe.
Republican presidential nominee Donald Trump has dubbed himself the "law and order candidate" and has said that "we have to give power back to the police, because crime is rampant".
To reduce the toll of gun violence, Trump has argued that law enforcement should be "tougher" and has dubbed himself the "law and order candidate", a stance that cuts against what had been a growing bipartisan consensus that America's criminal justice system is too expensive and too punitive.
Sheridan has dubbed himself chief storyteller.
Having dubbed himself "Mighty Mikey", he went to wrestle Ted DiBiase, Jr., Sinn Bowdee, Heath Miller, and Jack Gabriel throughout the early part of 2008.
On his MySpace page, Kanakaole had dubbed himself "hawaiiansoljah" and adopted this quote, "id rather die on my feet then live life on my knees".
(The first lady has dubbed it Camp Obama).
His son has dubbed Mr. Falk "a boxcar cantor".
A Russian journalist has dubbed them "the new angry ones".
