"What in the name of Thomas Alva Edison do you think you're doing?!"
"What in the name of Thomas Alva Edison?" was a phrase used by Emmett Brown, presumably during his youth.
Marty McFly heard it once in 1931, when he had offered Edna Strickland to host the meeting of the Stay Sober Society in the Brown residence without the knowledge of Emmett.
Upon hearing about it, Emmett reacted in a worried and somewhat angered manner, quietly shouting "What in the name of Thomas Alva Edison do you think you're doing?!"