He said his term "outercourse" referred to Turner having his clothes on when he was caught by two Swedish grad students on top of the victim outside a fraternity party on the Stanford campus in Palo Alto, California, on January 10, 2015.
In a case that gained worldwide attention, Turner only served three months of a six-month sentence after being found guilty of intent to commit rape, penetration of an intoxicated person and penetration of an unconscious person.
An attorney for a former Stanford University swimmer found guilty of sexually assaulting an unconscious and intoxicated woman in 2015 argued the conviction should be overturned because his client was fully clothed and wanted only "outercourse" from the victim, not intercourse. Multhaup added Turner only took part in "sexual outercourse" and did not intend to rape the victim, according to multiple reports.
The court now has 90 days to rule on the appeal.
The language and claims at the hearing, which came a month after voters recalled the judge who gave Turner six months in jail, stunned legal scholars and activists.
Turner's attempt to overturn his convictions began in December, when Multhaup filed a 172-page brief with the California appeals court.
Now, Multhaup is trying to specifically overturn the felony charge of attempted rape.
The sentence, which many described as too lenient, outraged sexual assault survivors and domestic violence groups across the country, resulting in a bid to unseat the judge who sentenced Turner, Judge Aaron Persky.
Turner, an OH native who's now 22, was found guilty of assault with intent to rape a blacked-out woman after a 2015 incident on the university campus.
Santa Clara County District Attorney Jeff Rosen said Turner received a fair trial and was justly convicted.
Multhaup also said Doe was capable of walking when she and Turner left the party together and that "the jury had to speculate that she [Emily Doe] was incapacitated" at the time of the assault about a half hour later. "You can't surgically remove things and look at them separately".
UC Hastings law professor Hadar Aviram told CBS San Francisco that questioning the jury's actions is a risky tactic.
Assistant Attorney General Alisha Carlile said that Multhaup presented a "far-fetched version of events".