The act of speaking positively about and/or building people up people behind their back, without their consent or awareness.
Gabe: "Nathan is the best instructor I've ever seen."
Evan: "He puts the rest of the professors at this college to shame."
Gabe: "He is someone I am happy to possip about."
Nathan: *off somewhere else, oblivious to his compliments*
Mary: "I love Paukert."
Luke: "Yeah, he's a really good guy."
Paukert: *at the local grocery store, nowhere near Luke nor Mary*