Due to Gwyneth Paltrow's well documented obsession of anal sex, the 'Gwinny P' refers to the bum hole
Sam: "Hey Lewis, you will never guess what Rhys did with his girl last night?"
Lewis: "Don't tell me she let him put it up her Gwinny P?!?"
Lewis: "Don't tell me she let him put it up her Gwinny P?!?"
by Samlogan117 September 28, 2018
Get the Gwinny P mug.