noun
something not needed; person who is in the way
Refers to an unwanted object or a person who is a nuisance or obstacle. The person usage is somewhat colloquial and can be blunt.
引っ越しのとき、余し物がたくさん出た。
When moving, a lot of unneeded things turned up.
彼は会議で何も発言せず、完全に余し物だった。
He didn't say anything in the meeting and was completely in the way.
Compound of 余し (amashi, the stem of 余す amasu, 'to leave over') + 物 (mono, 'thing'). Literally 'left-over thing'.