A lisp

When you want to say something you cant so you switch the word.

Well it'th a thpeech impediment you have when you're unable to pronounth your etheth correctly, like I'm doing right now. People like thith are uthually labeled thtupid or retarded thimply becauthe of the way they thpeak.

A lisp is when people pronounce their "s" sounds with a "th" sound. People with lisps should not be categorized as retarded or stupid but sadly most of the time are.

The most cruel and torturous word in the English Language, where a person has a speah impediment that stops them from speaking correctly.

A speech impediment which causes the person with it to mispronounce the sounds 's' and 'z'.

One of the most powerful and most respected family of programming languages by computer scientists. Lisp can rewrite itself on the fly, although this potential is rarely exploited. Mainstream Lisp dialects have steep learning curves, so they're rarely used outside of artificial intelligence, space missions, or computer algebra apps, but they are intended to be general purpose.

To talk with a speech impediment and not be able to sound out their Esshes.