Describes something being physically flipped so that top and bottom are reversed. Can also be used figuratively for a situation where the normal order is reversed.
The picture is hung upside down.
Do not open the box when it is upside down.
逆さま is a more general term for 'upside down' or 'reverse', while 上下逆さま specifically emphasizes the top-bottom reversal.
上下 means 'top and bottom' or 'upper and lower'; adding 逆さま turns it into 'top and bottom reversed'.
Standard kanji-kana mixed spelling.
Variant with 逆 written in kana.
Variant using 様 instead of さま.
Compound of 上下 (じょうげ, 'top and bottom') and 逆さま (さかさま, 'upside down, reverse').