Censor.NET reports citing The Guardian.
"You don't have to be a husband or a father to hear what we heard just a few days ago and say that's not right," the president said in Greensboro, North Carolina, in his first public remarks since the release of a 2005 tape showing Trump bragging about groping and kissing women without their consent.
"You just have to be a decent human being to say that's not right."
Campaigning on behalf of Hillary Clinton in North Carolina, Obama said the Republican presidential nominee is unfit "for a job at 7-Eleven", let alone the presidency.
He encouraged the crowd of nearly 8,000 to respond at the ballot box in November.
"If it makes you mad", the president said, "then you say 'That's not somebody I want representing the United States of America'.
"The guy says stuff nobody would find tolerable if they were applying for a job at 7-Eleven," he added.
Ahead of the Florida rally, Trump lashed out at Speaker of the House Paul Ryan, who this week announced he would no longer defend Trump or campaign with him although he stopped short of formally withdrawing his support of the nominee.
"They're not giving support - they don't give the support that we really need - but the fact is that I think we should get support and we don't get the support from guys like Paul Ryan," Trump told Fox News host Bill O'Reilly on Tuesday. "[Ryan] had a conference call with congressmen, with hundreds of them, and they practically rioted against him on the phone. One person stuck up for him."
"And I don't really want his support," Trump added of Ryan.