on the boil
prep_phrase
RareNot in standard dictionaries
1
simmering strongly and about to boil.
2
About to happen; imminent.
3
boiling.
4
continuing; active; in a state of activity or development.
5
Going smoothly; working well.
6
Playing exceptionally well.
7
(Of a player taking a pass) running at full speed towards the opposition.
Thesaurus
#colloquial