The practice of having sex involving three participants."Troilism is an unusual practice.""The woman wants to censor us, Hill. If she had her way, all we'd show would be Andy Pandy, and she'd stop him climbing into that basket with Looby Lou - let alone Teddy - lest some child be corrupted by the whiff of troilism. And bestiality, I suppose - or would it be bestiality with a ... rather than a real bear?" - Sir , portrayed by in , on his exasperation at 's () attempts to remove any material deemed mildly offensive from TV.
Involvement in threesomes."I hear he's engaged in a bit of troilism."
