As an adjective peakling
is (dialectal|mississippi) sickly.
As a verb peaking is
As a noun peaking is
the act of something reaching a peak.
(dialectal, Mississippi) sickly.
* 1930 , William Faulkner, As I Lay Dying , Library of America, 1985, p.13:
- Jewel's eyes look like pale wood in his high-blooded face. He is a head taller than any of the rest of us, always was. I told them that's why ma always whipped him and petted him more. Because he was peakling about the house more.
The act of something reaching a peak.