A word called out, usually loudly, to harken hungry friends or associates to gather and travel enmasse to some established eating area such as a cafeteria or dining hall. The derivation may have originated from the phrase "let's go eat!".
A word shouted by a timber faller just as the tree that he has severed leaps from it's stump. This word is shouted to warn others in the vicinity to be aware. This word is not heard often in the woods any longer because of the numerous restrictions put on timber harvesting. These restrictions primarily came about from well intentioned,but misguided, environmentalists and their ilk.
Timberrr! Oh yeah I kinda' remember hearing that a long time ago. I'm not sure what it means. Maybe we should look it up in the Urban Dictionary.