Sexual intercourse between two male police officers
Chris and Charlie were on a regular patrol and when they stopped for a quick doughnut, the mix got a bit thick, before they knew it they're at it. Doughnutting.
Practice used in televised sessions in the UK's House of Commons (and other places) of surrounding the speaker at any one time with a coterie of camp followers who would yell "hear hear" and other such things. This would hopefully work to distract the cameraman's attention from the facts that firstly, most of the seats in the chamber would be empty, and secondly most of the remainder would be occupied by MPs who were filling in crosswords, sleeping, or otherwise unengaged in parliamentary business.
Expect lots more doughnutting around Gordon Brown in the next year or two.