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.
When moving, a lot of unneeded things turned up.
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'.