Might could.
source:
LAGS
Entry:
315
Example:
Might could.
Modal 1:
might
Modal 2:
could
Gender:
Male
Race/Ethnicity:
White
Age:
59
Level of Education:
High school (Graduate)
Home Community, Town, or State:
TN (Chattanooga)
Location Collected:
TN (Hixson)
Year:
1970
Relation to Addressee:
subject to fieldworker
Medium:
Spoken
Sentence Structure:
unknown
Status:
Naturalistic