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1.
GBU
Short for God Bless You.
Bob: I just crapped myself.
Billy: GBU.
by mr. al September 07, 2006
 
2.
G-Bu is an abbreviation for George W Bush, following J-Lo (Jennifer Lopez) taking on a similar nickname.
Dang, I can't believe G-Bu is about to throw down with Saddam.
by C-Rex August 09, 2006
 
3.
GBU
George Burns Unit: a Unit of Time comprising 100 years, named for the actor and Vaudeville comic George Burns, who attained 1 'GBU'. Additional or lesser time can be represented as a fraction of 1 GBU.
"It's been just over 1 GBU since the Titanic sank."
by AlexHCM April 27, 2013
 
4.
The smallest ass to run for vice president. Supports boyfriends that have mustangs and are obsessed with computers. Will fund art schools nationwide. Can be found alongside President nomination E-CO.
G-Bu for vice president! Haytonn says: Vote for E-Co.
by Joober January 23, 2005