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1. n. An alternative browser based on Mozilla FireFox, created with similar ideals as Gnuzilla. The reason it was created was because the fucks who created Debian didn't like Mozilla's shitty Public License, which releases only the source code, not the branding, under the GPL.
Possum: So, did you get the new FireFox?
Dylan: What are you smoking?! It's called IceWeasel now, n00b! What version of Debian do you think you're using?!
Iceweasel by Yubimusubi October 25, 2006
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A term for Debian users or enthusiasts. From the rebranded name for Firefox in Debian.
Iceweasels have made a sensible OS choice.
Iceweasel by Bentley T. Coon August 18, 2010

ice weasel 

anything that might trough a wrench into fixing your snowmobile - for good.
an ice weasel could be a potential ersatz spouse. Other examples could include: friends who make themselves out to be enemies; enemies who make themselves out to be friends.