A piece that has been cut off of a larger piece when not needed; surplus.(noun)
Cut off.(adjective)
Excess; surplus.(adjective)
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Use "offcut" in a sentence
"This sounds more like a Beach Boys offcut mind, but the lyrics are unimpeachable in their brown-nosing: "They were playing lovely tunes/by the light of the moon.""
"The flowers are passable, but also inexpensive, but the lace is like offcut afterthought thrown on the bodice, and probably about 5 bucks worth."
"Yesterday afternoon I painted this – acrylic paints on an offcut of matt board."