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1.
Adjective:

1. When someone says something completely nerdy, or recites movie quotes in normal conversation.
"Wow, that was totally fletchy."
by anh530 August 11, 2009
 
2.
Adjective. Southern. rural
The dog was getting all fletchy so we had to leave.
by RedWriter December 05, 2004
 
3.
artsy fag; one who spends a lot of time painting and being with his family...
fletchy won't come beck...
by oh my June 15, 2004