give something one's call
slack off
be a nervous wreck
keep up
draw the line
have a lot on one's plate
be on call
make it clear that something is unacceptable
not work as hard as one should
do something with maximum effort
finish everything that needs to get done
have lots of things that need to get done
make oneself available for someone to conatct at any time.
be anxious or worried about something