(noun)-The act of trying to avoid another person while approaching them in the hall, but failing and ultimately colliding with them.
When Orenthal saw Betsy in aisle 4 of Dominick's, he tried to avoid her, however, in this case pippipipy was inevitable as the two ran right into each other.
12 step recovery jargon referring to someone new who talks about how great life is, now that they'resober. Usually meaning that the person is out of touch with reality.
The new guy seems pretty happy for a dude who has no job, no money and no family. He must be on a pink cloud.