A term used by a twat
in usenet. Meant to mean "ha ha". Proponents generally ignorant of fact that no-one starts laughing with a "b".
Considered by those with a slim grasp of the English language to be the last word in witty discussion.
Actual occasions when user has laughed whilst typing it: zero.
An indication of the twattiness of the user can be discerned by the levels of:
(b) hahaha's following 'bwa'
(c) exclamation marks following word