Use the term 'going chalk' to describe a person who picks all of...

[Mytko]

English Language Tests, Intermediate level

ESL/EFL Test #585 "English Slang Idioms (327)", question 1

California is an interesting place because one can find people from all ......... of life living together in harmony. There are business men and women in suits, hippies in tie-dye shirts, people from other countries and other cultures and a lot of people interested in science and ecology, among others.

(a) works
(b) forms
(c) results
(d) walks

English Language Tests, Intermediate level

ESL/EFL Test #585 "English Slang Idioms (327)", answer 1

California is an interesting place because one can find people from all walks of life living together in harmony. There are business men and women in suits, hippies in tie-dye shirts, people from other countries and other cultures and a lot of people interested in science and ecology, among others.

Correct answer: (d) walks
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Why do they use the term "going chalk" to describe a person who picks all of the favored teams on their NCAA basketball picks?

Mytko

[Mister Micawber]

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I don't know and I cannot find it on line, Mytko, but I'll take a guess. If the statistics were calculated on a blackboard, then the expected odds would be written in chalk, and if you were to follow those calculations, you would be 'going with' the chalk, or 'going chalk'.

Just a guess; I would be delighted if someone can post an authoritative etymology.
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Native English teacher at Mister Micawber's