My Uncle Oswald is a 1979 novel in the sex comedy genre written by Roald Dahl.

The novel stars Uncle Oswald, a character who previously appeared in "The Visitor" and "Bitch", two short stories also written by Roald Dahl (and which can both be found in the 1974 book Switch Bitch).

When Uncle Oswald discovers the sexually invigorating properties of the "Sudanese Blister Beetle"', he devises a plan to steal the semen of great men and sell it to women who want to have children fathered by geniuses.

In his 1980 review, Vance Bourjaily said:^[1]

What can be said is that My Uncle Oswald provides four or five hours of effortless reading and some amusing scenes, mostly of the kind film makers have taught us to call soft porn—so soft, indeed, that at times they turn out almost fluffy. The tone is that of a gentleman telling ribald anecdotes to his male guests after dinner. The leer is civilized... the dialog gets mean and raunchy, but the physical detail is kept decorous.... Mr. Dahl's guests are not invited to vicarious orgy, then, nor will they hear a disguised lecture by a wicked satirist of morals and manners.... Summer reading.

Christopher Lehmann-Haupt called it "a festival of bad taste that is at heart so innocent that we soon forgive it and enjoy ourselves," "thoroughly juvenile fun," and said "I haven't had so much fun of this sort since my last all-night joke-telling session at summer camp."^[2]

Movieweb named it as one of 8 Roald Dahl books that need a screen adaptation.^[3]