The phrase "Cheese & Whiskers" is used when one is frustrated... This term could be used instead of several profane comments such as "ah, Shit" or "Damn It".
The comment was originally uttered by Mr. Ratt who was a major character in the British children's show "Banana's in Pyjamas" for additional information research the aforementioned TV show and it's catch phrases.
You are walking along with a cup of coffee from your nearby Starbucks (you paid a pretty penny for it) and you trip and dump half of the coffee on the ground. At this point you say in an adjitated and rather angry voice "Cheese & Whiskers".