Best definition
A thread on a messageboard that had a good intention, but was eventually hijacked and turned into a post pumping

Waimi has its origins in the spring of 2004 when an individual by the name of NeoChrist, at a Tool messageboard posted a thread entitled “Why are introverts more intelligent?”. After about 2 pages of serious discussion, forum trolls hijacked it, and 40 pages later the thread was locked.

N. “Shit, it looks like that thread is a waimi now.”

V. “Fuck dude, lets go waimi that thread about abortion.”

A. “That’s so waimi.”