of Slacken
Source: Webster's dictionaryI was always incredibly driven and found it impossible to relax. I felt that if I slacked off for a minute to enjoy myself, then so many things would be missed. Sandra Bullock
I used to write a lot about the subject but I have slacked off because so few, other than relatives of the murder victims, seem to care except when the murder victim is regarded as well placed in our society. Source: Internet
T. Schumann (144) slacked a day off work to open the batting for Cowell. Source: Internet