to get your pants pulled down by your mates in front of other people
"ahhaha Tom just got dacked" Tom has pants around ankles at this point and everyone is laughing
by kRyStLe October 07, 2003
1 more definition
verb : the act of defacing an object (usually a book, but not always) by drawing crude depictions of male genitalia upon it
"Damn, Landers dacked my Science book!"
by Grasshopper_74 October 10, 2008