Feet?

Just saw R., a friend of mine, down the street.
He said he got home late last night and mixed together the following ingredients for his dinner: Onion, cucumber and ranch dressing.
"What'd it'd taste like?" I said.
"Feet."
Then he wasn't feeling too hot so he ate some bland cereal.
"In case you're wondering," he said, "milk doesn't sit well with onions."
Or, probably, feet.