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1.
the sexual act of having anal sex with your partner, right after you climax you bust out with a sharpie and sign her ass. insertion of said marker afte signature is optional.
that chick got pissed when i gaver her the celebrity last night.
by tucsontony October 20, 2004
 
2.
Colloquial name for high level technical and/or engineering staff who travel around to assist the general team members perform complex tasks
"Yeah mate, they had to get the celebrities in to help align that new wireless link the other day."
by omega-00 July 28, 2012