This might be slightly silly way to do it, and I'm not a regex expert. But I think this way your regex doesn't have to work through the whole string. 
#!/usr/bin/perl

$string = "something, something, something, this";

$string = reverse $string; 
$string =~ s/\S+\s//;
$string = reverse $string;

print $string;

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UPDATE:japhy's answer is more efficient. I've updated my code it was originally $string =~ s/\S+\s(.*)/$1/;

In reply to Re: parse a string by thunders
in thread parse a string by Anonymous Monk

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