LONDON (AP) — Many people have student antics they'd rather forget.

British Prime Minister David Cameron's university days at Oxford are in the news thanks to a new book by a former Conservative Party treasurer.

Michael Ashcroft, who donated millions to the party before falling out with Cameron, has co-written "Call Me Dave," an unauthorized biography that includes allegations of drug-taking and juvenile sexual escapades.

Extracts published Monday in the Daily Mail newspaper claim Cameron smoked marijuana and once inserted "a private part of his anatomy" into a dead pig's mouth during an initiation ritual.

Downing Street said Cameron would not "dignify" the claims with a response, and they are likely to prove more embarrassing than harmful. Satirical responses flourished on social media under the hashtags #piggate and #hameron.