What does ADBB mean?
All done, bye-bye
Other definitions of ADBB:
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How to use the term ADBB:
There are no example uses of ADBB at this time. We would greatly appreciate your contribution if you would like to submit your own!
More slang terms:

LTR
later

SPLOITS
exploits

IGTGT
I got to go tinkle

BOC
Butt on chair