Well- my son used put on his 'beat selt.'
And I overheard one of his friends tell him (they were both about 5 at the time, and my son was VERY gullible) 'I was going to be a twin, but I ate the other one.'
It took my son and DDIL over a year to figure out what their older autistic son meant when he said 'Wassa.' Both sons are autistic, but the younger one is very verbal, while the older one is almost non-verbal. DDIL often says 'What's up?' when she picks the boys up from school, and the older boy is using his version of that word instead of 'MaMa' - which he has never said, by the way.