Using lines from motivational or inspirational posters to spurr on or motivate an individual, usually during a sporting event or physical activity. The person yelling the successories is often very lazy and annoying and when they do this it incites hatred on the part of the receiver. Example of this is "Never give up" and "Eyes on the prize"
Peter on season 10 of The Amazing Race often did this to his partner Sarah, who had one fake, bionic leg.
Peter often shouted successories at Sarah while she struggled to do a very physical task and he sat there being lazy and useless.