heat up
US /hiːt ˈʌp/
UK /hiːt ˈʌp/

1.
2.
intensiveren, spannender worden
to become more intense or exciting
:
•
The debate started to heat up as both sides presented their arguments.
Het debat begon op te warmen toen beide partijen hun argumenten presenteerden.
•
The competition is really starting to heat up.
De concurrentie begint echt op te warmen.