Top Definition
Fasnig is the shorthand way of writing fascinating. Often used in text messages and chatrooms as an alternative to writing the whole word fascinating.

Originated from Sam and his own language (Samenese) which has since it's creation gone viral.
"I hear that 5 billion crayons are produced every year" "Wow fasnig"
by SnowmanBob April 04, 2011
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