Lines - the outcomes offered by the bookmaker. They can be standard, for example, total 2.5 for football. Extended line - more complex and interesting options. These include statistics, duration of matches and halves, results of individual players, combinations of different indicators.
Low roller is a customer who makes many bets with minimum financial expenses. This is the antonym for word “high roller”.
Ludomania is a mental disorder; gambling games dependence which is manifested in pathologic gambling to the detriment of the social and family values.