What is the least vulgar but still natural (not overly formal) of these: Bum, bottom, backside, behind, rear end...
As she walked past him, he stared at her _________.
What is the least vulgar but still natural (not overly formal) of these: Bum, bottom, backside, behind, rear end...
As she walked past him, he stared at her _________.
"Bum" A little bit naughty. Naughty enough to make five-year-olds giggle with the rudeness.
"bottom" Fairly standard. Common, but not vulgar.
"backside"/"behind"/"rear end" are all euphemisms. All equally polite.
The last three are the least vulgar, but none are rude enough to cause offence.