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Connecting to a unlocked wireless network that is not your own without the knowledge of the wireless networks owner.
A: I couldn't pay for internet at my house, so I drove down to the coffee shop, parked next to their back door, and buffaloed their internet.

B: Yeah, I've been buffaloing from my next door neighbor for the past year.
by Cacardinal September 16, 2009
To pump one's cavernous tissue.
Scott was hiding in the bathroom stall, buffaloing all during math class.
by intimidat0r June 06, 2007