The suspect, who earned his nickname because of his "pushy demeanor," robbed a Chase Bank at 2639 N. Milwaukee Ave. about 2:20 p.m., according to the FBI.
He typically yells at bank tellers and customers and pushes patrons out of the way, but does not show a weapon, the FBI said.
His first heist was in November at a North Community Bank branch at 1600 W. Chicago Ave. in West Town, the FBI said. He's suspected of robbing 11 banks, some in the city and others in Berwyn.
His 10th robbery took place at a Plaza Bank branch at 5601 W. Belmont Ave. in Portage Park on March 29.
The suspect is described by the FBI as a Hispanic man 20 to 30 years old with black hair, brown eyes, 5 feet 8 inches tall with medium build. He has mustache and wears a black hoodie, authorities said.
The FBI asked anyone with information to call (312) 421-6700.