The uncanny ability to detect when hideously ugly people are in close proximity to oneself, or are rapidly closing in on one's position.
Worker 1: It's after 9:00, is that heffer Katarina going to be in the office today?
Worker 2: Well, she hasn't called in. And on top of that, my ugdar is pinging like mad so she must be on her way now.
Worker 2: Well, she hasn't called in. And on top of that, my ugdar is pinging like mad so she must be on her way now.
by FarmAnimal April 29, 2009
Get the ugdarmug.