LACTHD = Let's All Calm The Hell Down

First started between two forum dwellers -Roach- and -Pork-, when offended or in a place where people are insulting each other a lot, it became common to shout "LACTHD!!!" Although it can be used in many other situations. Spoken it is pronounced
"LACK-TED" Although it is more commonly used in forums.

It’s an acronym standing for Can’t Remember A Fucking Thing. It’s usually used to describe embarrassment at being unable to remember someone (CRAFT moment); going onstage as the lead in the latest theatrical performance and your mind goes completely blank (CRAFT situation); the next morning after a night when you got pissed as a fart and woke up in bed cuddling a traffic cone and a string of fairy lights wound round your prick.