DCHP-1 Online
tumtum [< Chinook Jargon, in allusion to a beating heart] West Coast 
n. heart; affection; mind; opinion.
- 1868 (1869) But he has aye the grit, / Tho' his "tum-tum" may be sair, / For anither year is coming.
- 1872 . . . she had shown a good tumtum (heart) in assisting the needy.
- 1874 (1926) His Lordship stepped forward . . . saying he knew by what he had heard the tom-tom of the whole tribe.
- 1915 Peter soon realized that his wife was eating at his table and living in another man's tum-tum. . . .
- 1963 "Me hyu sick tum-tum. My papoose going mamaloosh I t'ink."
- 1868 (1869) But he has aye the grit, / Tho' his "tum-tum" may be sair, / For anither year is coming.