What is the meaning of "don't pin me down with a label"?

[Dallance]

English Language Tests, Intermediate level

ESL/EFL Test #414 "English Slang Idioms (154)", question 6

"Jocks are so annoying. Take Josh, for example. He walks around here like he owns the campus. Ten years from now, though, he'll be working for me," Elmer said. Josh replied, "Don't pin me down with a .......... For your information, I got very good grades last semester and I enjoy lots of things besides sports. I like gardening, for example."

(a) saying
(b) label
(c) libel
(d) expectation

English Language Tests, Intermediate level

ESL/EFL Test #414 "English Slang Idioms (154)", answer 6

"Jocks are so annoying. Take Josh, for example. He walks around here like he owns the campus. Ten years from now, though, he'll be working for me," Elmer said. Josh replied, "Don't pin me down with a label. For your information, I got very good grades last semester and I enjoy lots of things besides sports. I like gardening, for example."

Correct answer: (b) label
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what is the meaning of "don't pin me down with a label"?

Dallance

[Mister Micawber]

Don't stereotype me.
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Native English teacher at Mister Micawber's