Sir John Straw-jacket, or Strawberry?

[Joel S. Berson]

The expression "Been too free with Sir John Strawberry" is in Franklin's
"Drinkers Dictionary".

I have come across the expression as "Been free with Sir John
Straw-Jacket".  How might this -- or Franklin's version -- have arisen?

What might "straw-jacket" mean?  (I do not find it Googling, but I do not
have access to the databases others on this list seem to use.)  Could it
have been a New England regionalism for "strawberry"?

Joel