To call out another on a failure or a mistake, generally in front of a group, to avoid having blame for their inadequacies being placed on you.
At the meeting, everyone was behaving like not filing the documents in time was my fault, so I had to frontstab John by asking him why he didn't complete them in time for me to file them
the act of brazenly sifting through bulk trash that suburban homeowners place in the front of their lawn a few days before the bulk trash collectors come to pick it up. Fronster diving takes place in broad daylight in front of everyone (even the homeowner), and is a common practice by artists who like to recycle. Frontster diving goodies usually include tables, grills, nightstands, wall units, chairs and other items that can easily be given new life.
"Hey, bulk trash day is Monday. Wanna go frontster diving with me this weekend? Last time I scored a set of TV trays, a mattress, and a lawn chair!"