slack up

slack up (on something)

and slack off (on something)

to release the pressure or tension on something. Slack up on the rope a bit, will you? Please slack off!

Name	Pronounced	Usage
Izar	-	Basque
Alisa	ah-LEE-sah (Russian), AH-lee-sah (Finnish)	Russian, Finnish
Kacey	KAY-see	English (Modern)
Maggie	['mægi]
ŽElimir	-	Croatian, Serbian
Constans	-	Late Roman