when a group of people are talking/bitching about someone they're not sure they should be because either someone in the group is a big gossip or friends with the person they're bitching about; they 'beep' out the important words by trailing off.
example of the trail off in action
person 1: yeah i know she's so like.. mm
person 2: yeah and she came in and was like.. yeah
person 1: *agrees* yeah i remember that, it was so like...
person 2: yeah.. what is with her..
person 3: CAN SOMEONE PLEASE FINISH THE SENTENCE?!