Top Definition
1) Pebble in Japanese.
2) A character form the Touhou Project thats able to manipulate a person's subconscious.
1) Koishi means pebble in Japanese.

2) Koishi is my favorite Touhou character~
by Koishi January 27, 2011
2 more definitions
5 Words related to koishi
or for shawnmichaels on #koishi, it means stoned.. NOT FUCK YOU
by meh March 20, 2003
"fuck you" in japanese
#koishi
by Ryan March 20, 2003

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