腕押し (うでおし) Japanese meaning | Kotomora"Noren ni udeoshi" is a metaphor for a futile effort with no resistance.
In the past, "udeoshi" meant arm wrestling.
Built from
Etymology
Compound of 腕 (うで, 'arm') and 押し (おし, 'pushing'), the continuative form of 押す (おす, 'to push').