A player gets a hat-trick when they score three goals in one game, but the use of the term actually didn't start on the football pitch. The phrase came from cricket, and was used when a bowler took three wickets from three consecutive balls. The club would give the bowler a hat to celebrate this achievement.
When betting on the Over market you need the total goals of a game to exceed 3.0 for your bet to win. If the result total of the game is exactly 3.0 goals it is known as a push, meaning the total bet results in no winner or loser.
2/3 Goals in a Row by One Team means a wager on a single team to score 2 or three goals in a row. In other words, this is another way of fun betting where you do not pay any attention to final outcomes.