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1.
Usuratonkachi means thin hammer so basically it means Useless
kono usuratonkachi "you are useless"
by sonicflames October 28, 2007
 
2.
I'm pretty sure it means something along the lines of 'freaking idiot' in Japanese.

Used in episode 101 of Naruto
Me:I kinda lost it...
You:Usuratonkachi
by SoraTori December 11, 2006
 
3.
Usuratonkachi means thin hammer so basically it means Useless
kono usuratonkachi "you are useless"
by sonicflames October 28, 2007
 
4.
Japanese, literally translated to "thin hammer". can be taken as being called useless. But in the context of the Naruto universe, it takes on a sexual meaning. so, not useless. but an insult to ones penis
Guy A- usuratonkachi
Guy B- What in the hell did u just say?
Guy A- I just said you had a thin hammer
by deweyd May 16, 2010
 
5.
it means dumbass in japanese...
naruto episode 101
sasuke:you dumbass
konno usuratonkachi
by kiara onee-chan May 28, 2008