Half time/full time - means a wager placed on the outcome of the first or second half (final outcome) of the match. Example: W1/W2, where in order to win the team must win in both halves.
Handicap is a synonym for an "advantage". A necessary advantage, providing the opponent with an opportunity to win or not to lose. When making bets, a bookmaker sets negative values for its favourites and positive ones for the opponents.
Hat-trick is a term used to describe a situation on the field, when 3 goals are scored by one player. The results of one game are taken into account.
Hedging is a concept that came from stock trading. It includes a kind of insurance, which consists in changing the stake to the opposite outcome. As a rule, this is done live. In this way, experienced players increase the likelihood of winning.
High roller is a player betting large amounts of money. As a rule, bookmakers meet the needs of such bettors, increasing the limits and offering more favourable odds.