We don't have synonyms for foul-tempered yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are soul, fool and foil.
(n) :
(sports) A breach of the rules of a game, especially one involving inappropriate contact with an opposing player in order to gain an advantage; for example, tripping someone up in soccer, or contact of any kind in basketball.
(v) :
(transitive, basketball, soccer) To make contact with an opposing player in order to gain advantage.
(v) :
(intransitive, basketball, soccer) To commit a foul.
(adj) :
Dishonest or not conforming to the established rules and customs of a game, conflict, test, etc.
(adj) :
(baseball) Outside of the base lines; in foul territory.
(v) :
(transitive, baseball) To hit outside of the baselines.
(n) :
(sports) A breach of the rules of a game, especially one involving inappropriate contact with an opposing player in order to gain an advantage; for example, tripping someone up in soccer, or contact of any kind in basketball.
(v) :
(transitive, basketball, soccer) To make contact with an opposing player in order to gain advantage.
(v) :
(intransitive, basketball, soccer) To commit a foul.
(adj) :
Dishonest or not conforming to the established rules and customs of a game, conflict, test, etc.
(adj) :
(baseball) Outside of the base lines; in foul territory.
(v) :
(transitive, baseball) To hit outside of the baselines.