Answer:
False
Explanation:
It is in fact an idiomatic expression. This expression can be found in Emily Dickinson's poem. Here is an excerpt:
<em>But never met this fellow,
</em>
<em>Attended or alone,
</em>
<em>Without a tighter breathing,
</em>
<em>And zero at the bone.</em>
<em />
It seems to be a reference to zero degrees (super cold). As if the character is shivering from fear with the same intensity that the character would if it was 0 degrees.