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3.
To have anal sex: derived from the Australian slang date, meaning asshole, on account of its generally round, wrinkled and brown appearance.
"Let me update you."

"I'm hoping to update her this evening."

"He promised he would update me. It's most frustrating."

"I've been giving him hourly updates."
by Roger the Cabin Boy August 18, 2006
 
1.
1.to record the latest information

2. to bring something up-to date
I have to update my browser.
by The Return of Light Joker August 03, 2008
 
2.
Getting a boner.
Hey man, I just got the BIGGEST update after seeing Kelly in a swimsuit!
by George Prices January 14, 2011