expression, ichidan verb
give away gladly; be happy to get rid of
Idiomatic expression meaning to give something away with pleasure, often because one is glad to be rid of it. The image comes from attaching a decorative paper (熨斗) to a gift, implying a cheerful offering.
いらなくなった家具を知人にのしを付けてあげた。
I happily gave away the furniture I no longer needed to an acquaintance.
彼は迷惑な客をのしを付けて帰らせた。
He was glad to send the troublesome guest packing.