You can suggest, but I don't see any basis for that suggestion. [...]
Well, certainly no hard proof, but perhaps a tenuous basis: Treborski, Kate and Filsmith (all AE) say they' ve heard it used. Sound shift (BE) has never heard it; dadane (BE) seems to know it only from American TV/films; and I (essentially BE) have never heard it used in the UK, but have come across it in the US.
Only a small sample, I admit, but it tends to point to the usage being more common in the US — and since colloquialisms cross the pond very easily these days, I'd say it's fair to suggest that the only example quoted of UK usage (well, sort of!

) is an 'adoption'.
Also, unlike on WR, members of the iVillage forum don't show their native language or origin, so we can't even be sure that the poster is native BE. As for the "def", I'm not convinced it represents spoken language (unless dadane can confirm it's really Estuary): it could well be an internet/text abbreviation, judging by the rest of that thread.
It would be interesting to know if anyone has first-hand knowledge of non-N.American usage of "doing food" to mean eating food.
Ws