The phrase "a slight affair" is correct and usable in written English.
It can be used to describe a minor or insignificant event or relationship, often with a connotation of being casual or not serious.
Example: "Their relationship was nothing more than a slight affair, lacking the depth and commitment of true love."
Alternatives: "a minor affair" or "a trivial matter".
Perhaps because the pair of books that started the palaver are such a slight affair — just over two hundred pages when pasted together.
Even in 1911, "Spectre" must have been a slight affair; its reputation came from Vaslav Nijinsky's legendarily aerial, sensual performance as the spirit of the rose, who appears to a young girl (Tamara Karsavina in the original cast) after she has returned from a ball.
A Cat In Paris is a slight affair at just over 60 minutes and the nifty touches are better appreciated by adults.
This directorial debut from writer Hossein Amini is a handsomely mounted if somewhat slight affair, beautifully photographed by Marcel Zyskind, gorgeously dressed by Steven Noble, and well played by the central trio, whose shifting motivations and increasingly paranoid allegiances remain a matter of intrigue.
Iris is a slight, conventional affair by Maysles's standards, and a touch repetitive – endless bolts of fabric and panoplies of costume jewellery laid out for our appreciation.
But those other roles had been slight affairs, and in M, he was the closest thing to being the movie's star.
Oren Rudavsky's movie, which he and Daniel Saul Housman adapted from Daniel Menaker's 1998 novel (parts of which first appeared in this magazine), is a slight and rueful affair, intermittently funny, about Jake's attempt to equip himself for the giving and receiving of love.
An opinion poll – taken in the two days after Closer magazine revealed Mr Hollande's affair – showed a slight upturn in the number of French people who approve of the President.
He's proud of his son; he even feels a slight envy, which he retires by enjoying the affair vicariously.
The conceit that Shostakovich was an avid reader of military-affairs coverage in the Times added a slight comic note to the proceedings.
Only in Germany did a slight majority express confidence that Mr. Bush would do the right thing in world affairs -- 51percentt compared with 46percentt who disagreed.
