Top Definition
a japanese cookie that when eaten, gives you gas and heartburn.
Daniel: hey martin wanna try these new japanese cookies?

Martin: OOOO i want cookie!!!

next day

Martin: Dude, that joompu gave me serious gas. and i dont know if it was the cookie, but i got a nasty heartburn.
by pietrzak February 01, 2007
Free Daily Email

Type your email address below to get our free Urban Word of the Day every morning!

Emails are sent from We'll never spam you.