The phrase "a string of offensive" is not complete and lacks context, but it is grammatically correct.
It can be used when referring to a series of offensive remarks or actions, typically in discussions about language or behavior.
Example: "The comedian's routine included a string of offensive jokes that left the audience divided."
Alternatives: "a series of offensive" or "a chain of offensive".
Clarkson has come under fire this year for a string of offensive remarks.
She spews out a string of offensive views on Jews, the homeless, people with intellectual disabilities and others while her husband, Dave David Calvittoo), tries unsuccessfully to muzzle her.
Efforts by Nigel Farage's party to shake off claims of unpalatable views in its ranks have been made harder by a string of offensive comments by candidates and other high profile figures.
(Silver's decision wasn't unprecedented: Major League Baseball banned the Cincinnati Reds owner Marge Schott from taking part in team operations in 1993, and again between 1996 and 1998, as punishment for a string of offensive remarks she made about Jews, African-Americans, and Asians).
Paris Brown posted a string of offensive comments on Twitter before she was given the £15,000 a year job to improve relations between Kent police and young people.
The racist faxes sent to Clyburn's office follow a string of offensive, threatening, and destructive incidents directed at Democratic supporters of health care reform legislation.
President Mahinda Rajapaksa's government has been widely criticized for abandoning the truce and carrying out a string of offensives after a series of rebel attacks.
More significantly, Operation Mistral 2, as well as Operation Sana, as the first in a string of offensives launched shortly before the end of the Bosnian War, were crucial in applying pressure to the Bosnian Serbs.
Battle of Amiens, (August 8 11 , 1918, World War I battle that marked the beginning of what came to be known as the "hundred days," a string of Allied offensive successes on the Western Front that led to the collapse of the German army and the end of the war.
Ever since alt-right provocateur Milo Yiannopoulous sent actress Leslie Jones a string of deeply offensive tweets, insulting the comedian's race and intelligence, Twitter has made banning abusive accounts a priority.
In between a string of major offensives by federal forces have failed to fulfill promises to stop the killing.
