Improvisation
noun, の adjective
An instant interest in something you didn't have interest in before? Well, time for some improvisation, because you're going to have to pretend you have interest in it (since you don't actually).
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own. Watch out for the shortening of そく.
みんなは彼が即興で作った詩をすごいねと褒めたが、口先だけなのは見え見えでした。
Everyone told him that his impromptu poem was great, but it was obviously just lip service.