Sneak's Slip 'N Slang - Typewaiter / Typewaiting

Typewaiter/Typewaiting: Fast typists who strike up Instant Message dialogues, having forgotten that the other person is a hunt and peck typist, causing the fast typists to have to wait for what seems an interminably long time before receiving a response.

Example: Sorry I'm late. I was stuck in an IM with a typewait situation.