tighten up
US /ˈtaɪ.tən ʌp/
UK /ˈtaɪ.tən ʌp/
1.
to make something tighter or more secure
:
•
Please tighten up the screws on this chair.
•
The regulations need to be tightened up to prevent fraud.
2.
to become more disciplined or efficient
:
•
The team needs to tighten up their defense.
•
We need to tighten up our spending habits.