Top Trumps appeared to be a game in which you got cards, and...

Top Trumps appeared to be a game in which you got cards, and the cards had a picture (in this case, of a horse), and told you all kinds of stats for that horse, how fast it was, how big it was, etc. Whoever had the better horse won both the cards. You repeated this until someone had all the cards. So, basically it was exactly like high school, except it only took three minutes. Which was really a bit more humane, if you thought about it.