Might could.
source:
LAGS
Entry:
441
Example:
Might could.
Modal 1:
might
Modal 2:
could
Gender:
Male
Race/Ethnicity:
White
Age:
43
Level of Education:
College
Home Community, Town, or State:
TX (Brownsville)
Location Collected:
TX (Brownsville)
Year:
1974
Relation to Addressee:
subject to fieldworker
Medium:
Spoken
Sentence Structure:
unknown
Status:
Naturalistic