You might try to trim the boundary assertions off of the stringized Regexp object (sorry for all the wrap-around):

c:\@Work\Perl\monks>perl -wMstrict -le
"use Regexp::Common;
 ;;
 print qq{$RE{profanity}};
 print qq{A: match '$1'} if 'xxxpissxxx' =~ m{ ($RE{profanity}) }xms;
 ;;
 print '--------';
 (my $erp = $RE{profanity}) =~ s{ \A \Q(?:\b\E (.*) \Q\b)\E \z }{$1}xm
+s;
 print qq{'$erp'};
 ;;
 print qq{B: match '$1'} if 'xxxpissxxx' =~ m{ ($erp) }xms;
"
(?:\b(?:(?:piss(?:\ take|\-take|take|e(?:rs|[srd])|ing|y)?|quims?|shit
+(?:t(?:e(?:rs|[dr])|ing|y)|e(?
:rs|[sdry])|ing|[se])?|t(?:urds?|wats?)|wank(?:e(?:rs|[rd])|ing|s)?|a(
+?:rs(?:e(?:\ hole|\-hole|hole|
[sd])|ing|e)|ss(?:\ holes?|\-holes?|ed|holes?|ing))|b(?:ull(?:\ shit(?
+:t(?:e(?:rs|[dr])|ing)|s)?|\-s
hit(?:t(?:e(?:rs|[dr])|ing)|s)?|shit(?:t(?:e(?:rs|[dr])|ing)|s)?)|low(
+?:\ jobs?|\-jobs?|jobs?))|c(?:
ock(?:\ suck(?:ers?|ing)|\-suck(?:ers?|ing)|suck(?:ers?|ing))|rap(?:p(
+?:e(?:rs|[rd])|ing|y)|s)?|u(?:
nts?|m(?:ing|ming|s)))|dick(?:\ head|\-head|ed|head|ing|less|s)|f(?:uc
+k(?:ed|ing|s)?|art(?:e[rd]|ing
|[sy])?|eltch(?:e(?:rs|[rsd])|ing)?)|ha(?:rd[\-\ ]?on|lf(?:\ a[sr]|\-a
+[sr]|a[sr])sed)|m(?:other(?:\
fuck(?:ers?|ing)|\-fuck(?:ers?|ing)|fuck(?:ers?|ing))|uth(?:a(?:\ fuck
+(?:ers?|ing|[aaa])|\-fuck(?:er
s?|ing|[aaa])|fuck(?:ers?|ing|[aaa]))|er(?:\ fuck(?:ers?|ing)|\-fuck(?
+:ers?|ing)|fuck(?:ers?|ing)))|
erde?)))\b)
--------
'(?:(?:piss(?:\ take|\-take|take|e(?:rs|[srd])|ing|y)?|quims?|shit(?:t
+(?:e(?:rs|[dr])|ing|y)|e(?:rs|
[sdry])|ing|[se])?|t(?:urds?|wats?)|wank(?:e(?:rs|[rd])|ing|s)?|a(?:rs
+(?:e(?:\ hole|\-hole|hole|[sd]
)|ing|e)|ss(?:\ holes?|\-holes?|ed|holes?|ing))|b(?:ull(?:\ shit(?:t(?
+:e(?:rs|[dr])|ing)|s)?|\-shit(
?:t(?:e(?:rs|[dr])|ing)|s)?|shit(?:t(?:e(?:rs|[dr])|ing)|s)?)|low(?:\ 
+jobs?|\-jobs?|jobs?))|c(?:ock(
?:\ suck(?:ers?|ing)|\-suck(?:ers?|ing)|suck(?:ers?|ing))|rap(?:p(?:e(
+?:rs|[rd])|ing|y)|s)?|u(?:nts?
|m(?:ing|ming|s)))|dick(?:\ head|\-head|ed|head|ing|less|s)|f(?:uck(?:
+ed|ing|s)?|art(?:e[rd]|ing|[sy
])?|eltch(?:e(?:rs|[rsd])|ing)?)|ha(?:rd[\-\ ]?on|lf(?:\ a[sr]|\-a[sr]
+|a[sr])sed)|m(?:other(?:\ fuck
(?:ers?|ing)|\-fuck(?:ers?|ing)|fuck(?:ers?|ing))|uth(?:a(?:\ fuck(?:e
+rs?|ing|[aaa])|\-fuck(?:ers?|i
ng|[aaa])|fuck(?:ers?|ing|[aaa]))|er(?:\ fuck(?:ers?|ing)|\-fuck(?:ers
+?|ing)|fuck(?:ers?|ing)))|erde
?)))'
B: match 'piss'
[download]

Update: Of course, this gets you right back to the Scunthorpe Problem noted above by Paladin!

---

---

Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!

Titles consisting of a single word are discouraged, and in most cases are disallowed outright.

Read Where should I post X? if you're not absolutely sure you're posting in the right place.

Please read these before you post! —

• How do I compose an effective node title?
• How do I post a question effectively?
• Markup in the Monastery

Posts may use any of the Perl Monks Approved HTML tags:

a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr

You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)

	For:		Use:
	&		&
	<		&lt;
	>		&gt;
	[		&#91;
	]		&#93;

Link using PerlMonks shortcuts! What shortcuts can I use for linking?

See Writeup Formatting Tips and other pages linked from there for more info.