The phrase "a bulky man" is correct and usable in written English.
It can be used to describe a man who is large and heavy in build, often implying a strong or solid physique.
Example: "The bouncer at the club was a bulky man, making it clear that he was not someone to be trifled with."
Alternatives: "a hefty man" or "a stout man."
A bulky man entered the bar shortly afterward.
Mr. Wheeler is a bulky man of thirty-four, with small features and a childlike expression.
Mr. Khan, a bulky man with the mien of a student acquired degrees and aliases at an equal rate.
Ominous music chills the soundtrack as a bulky man with a flashlight, accompanied by surly guard dogs, inspects the locks.
Mr. Halloran, a bulky man, had just about managed to throw on a long-sleeve T-shirt and bluejeans when he was taken into custody.
A bulky man with thick, unkempt tufts of hair that seem to run randomly across his head, he was gracious but not much of a conversationalist.
A tall, bulky man with a large balding head, a jutting chin, and the lumbering gait of an old prizefighter, he was wearing the uniform of the modern executive: a gray wool suit, burgundy tie, and blue shirt.
Former students and colleagues recalled a masterful performer who looked the part of the distracted professor: a tall, bulky man, usually rumpled, with a large, handsome head, a high forehead, and glasses perched on his prominent nose.
A tall, bulky man with a close-clipped beard and well-tailored suits, Mr. Nayed claims both Muslim Brotherhood members and Marxist feminists among his friends.
Then, slowly, the king (a famously bulky man in his 80's) eased himself down the gangplank and onto the pier.
An eyewitness, Cheryl Springsteen, a special-education teacher, testified that she was walking her dog when she saw a jowly, bulky man fire three shots at Dr. Malakov.
