Might could.
source:
LAGS
Entry:
437
Example:
Might could.
Modal 1:
might
Modal 2:
could
Gender:
Male
Race/Ethnicity:
Black
Age:
74
Level of Education:
Little (illiterate)
Home Community, Town, or State:
MS (Sherard)
Location Collected:
MS (Sherard)
Year:
1977
Relation to Addressee:
subject to fieldworker
Medium:
Spoken
Sentence Structure:
unknown
Status:
Naturalistic