adj.
1. Without mistake
2. Undoubtedly
"Sakki no jutsu, machigainai, Rasenganda!"
Meaning:
The jutsu undoubtedly is the Rasengan.
by ShashankS December 09, 2009
word that trancendes all complimentary words; such as fabulous, gorgeous, amazing, magnificant and etc. Often shouted, due to uncontrollably excellent feeling.
A: "Did you see his new Jaguar?"
B: "Yeah, it's totally machigainai."

A: "How was the party last night?"
B: "Machigainai!"
by soniact June 21, 2006
word that trancendes all complimentary words; such as fabulous, gorgeous, amazing, magnificant and etc. Often shouted due to uncontrolled excitement.
A: "How was the party last night?"
B: "Free booze all night long. It was machigainai!"

A: "You can use the VIP lounge."
B: "Machigainai!"
by soniact June 23, 2006

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