Bang on British phrase informal
To hit someone or something forcefully and repeatedly.
Having waited for so long, the hot-tempered customer banged on the table and urged the staff.
The police are banging on the door! Find somewhere to hide.
Precisely, totally, completely right.
His predictions about the weather were bang on.
Mary is bang on when saying that John is an impatient person.
The verb "bang" must be conjugated according to its tense.
The origin of this phrase is not clear.
People tend to like forbidden or illegal things just because they are forbidden or illegal.
He must have believed that stolen fruit is the sweetest, and he, therefore, cheated on his partner.