Top Definition
an endearing form of saying "hello" to your significant other....
boy: "hey baby."
girl: "hey u."
by 88 action September 18, 2008
a fortiudous typo when greeting someone online
dude1: heyu
dude2: hey
dude1: blah blah blah
by indeed105 September 01, 2005
When you don't know somebody's name so you say "hey u!"
"hello!"
"hey u!"
by Nikki Maywell April 27, 2016

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