1. A common spelling mistake, used when typing replacing "what"
2. Rarely used:
Slang for what; used in the UK,
Australia,
Japan, and most commonly New Zealand
"Ehat do u mean
bae, WDYM U AIN GAY I THOUGHT YOU LIKE BOYS LIKE ME EHAT THE
HECK"
"tf you even saying spell it right sis like i am but not for u we done"
Or
"Ach noh meh
bloody mary spilt"
"ehat?"