ABERDEEN MP Callum McCaig prompted sniggers today by referring to “a pig in a poke” while questioning Prime Minister David Cameron in the House of Commons.

The SNP’s Aberdeen South MP was speaking during Prime Minister’s Questions this morning when he made the remark during a question about apprenticeships.

It came after came after allegations were made in a new book by the billionaire businessman and former Conservative Party treasurer Lord Ashcroft that Mr Cameron took part in a student initiation ritual which involved him inserting “a private part of his anatomy” in the mouth of a dead pig.

Mr Cameron has refused to address the unsubstantiated claims.

Mr McCaig’s remark did not go unnoticed with Twitter users.

Pig in a poke comment from @callum_mccaig at #PMQs titter ? ? — Sara ? (@NadineBoynton) October 14, 2015

https://twitter.com/thesickracer/status/654257765184053248

George Osborne's reaction to SNP's "pig in a poke" question. pic.twitter.com/EwniiMuphu — Richard James (@richjamesuk) October 14, 2015