usage of 'L' in colloquial cantonese utterances I found this in what I suspect is a very colloquial Cantonese website:
點解觀塘咁L塞
What is this 'L'? I am sure I must have seen this before, but I do not understand in what context.
Thanks
From 廣東粗口五大字

撚:


讀作nan2。此字乃是假借字，「撚」字是指把玩、揉搓、撥弄等的動作，在部份場合下不被視為粗口，例如「撚手小菜」即解成拿手小菜、「撚雀」則是飼養雀鳥。


當用作粗口時，正寫為「尸」字裡加個「粦」字，[發音為 lan2]，俗寫為「門」字裡加個「能」字，即是「」字。當作為粗口時，則解成下列意思：


名詞，「陽具」的意思 (Noun: &quot;penis&quot;)


語氣助詞，只用於加強語氣，用於句子中；(Modal auxiliary words, only used to strengthen the tone and used in sentences)


助詞，用作顛倒句子原本意思，可視為反語。


近年網民使用時，有時為避免出現粗口字，會以英文字母「L」代替。 (In recent years, netizens sometimes use the English letter &quot;L&quot; instead to avoid swear words.)

點解觀塘咁(L)塞 = 點解觀塘咁(撚)塞 = Why is Kwun Tong so (damn) congested
'塞' is short for '塞車' (be congested)-  of traffic
We also use:

'小' for '屌'

'忍' for ''

'狗' for '㞗'

'西' for '屄'

'實' for '杘'