Remarkable bottom shown by male pants squeezing tight till it hurts (3-4,3)

I believe the answer is:

all-time low

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'remarkable bottom shown' is the definition.
I know nothing about this answer so I cannot tell whether it can be defined by this definition.

'male pants squeezing tight till it hurts' is the wordplay.
'pants' is an anagram indicator (UK informal term for 'nonsense' or 'rubbish').
'squeezing' indicates putting letters inside (squeeze can mean hug or embrace).
'tight' indicates anagramming the letters (tight can mean drunk).
'it hurts' becomes 'ow' (exclamation of pain).
'male' anagrammed gives 'amel'.
'till' anagrammed gives 'llti'.
'amel' enclosing 'llti' is 'alltimel'.
'alltimel'+'ow'='ALL-TIME LOW'

'by' is the link.

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