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
Tommie	['tɔmi]
Aonghas	-	Scottish
Trafford	TRAF-ərd	English (Rare)
Rudolf	ROO-dawlf (German), RUW-dawlf (Polish)	German, Dutch, Swedish, Norwegian, Danish, Polish, Czech, Hungarian, Slovene, Croatian, Russian, Arm
Kevin	KEV-in (English)	English, Irish, French, German, Dutch, Swedish, Norwegian, Danish
Velasco	-	Medieval Spanish