When you are fumbling at work and can't produce anything useful. the people around you are getting annoyed at your incompetence and you end up sitting on your own with your extra digit. Also, if you have bad body odour
Man, I just hit my thumb with that hammer, it was like I had an extra digit : you must have the Iddies.
Im trying to design this pram ramp, I've been on it for 2 months and still can't get it right : you must have the Iddies
I smell like an after curry turd...you must have the iddies