What does IDONNO mean?
i do not know
Other definitions of IDONNO:
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How to use the term IDONNO:
There are no example uses of IDONNO at this time. We would greatly appreciate your contribution if you would like to submit your own!
More slang terms:

NAK
nursing at keyboard

FMUTA
Fuck Me Up The Ass

WOZ
was

YSATI
you suck at the internet