878

source: 
DARE
Entry: 
878
Example: 
I might could should tell her about it.
Modal 1: 
might
Modal 2: 
could
Modal 3: 
should
Gender: 
Unknown
Race/Ethnicity: 
Unknown
Level of Education: 
Unknown
Home Community, Town, or State: 
Unknown
Location Collected: 
NC (central)
Year: 
1989
Medium: 
Spoken
Sentence Structure: 
1.0
Notes: 
Data is from Dictionary of American Regional English File; correspondent reports usage "now current, even among young underclass mountain types, are such phrases as “I might could should, meaning “perhaps I ought to.”