Top Definition
Internet slang

an abbreviation for "just a heads up"
Your crazy ex-girlfriend is headed your way jahu

Jahu, If you keep drinking like that youre gunna be showing everyone your niagara falls impression
by Ryan..the kid February 24, 2009
1 more definition
abreviation for "just a hook up"
pronounced like: "juh-huh"
kate: omg, i cant believe you had sex with rob last night!
julia: it was jahu, no big deal
by csavvv August 11, 2009

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