waste no time in (doing something)

to immediately begin an activity.

Caroline wasted no time in tackling her new job.

Will came right from the airport to the office and lost no time getting back to work.

• kick up a row
• kick up a stink
• kick up heels
• kick upstairs
• kick up the arse
• kick up the backside
• kick up your heels
• be whistling Dixie
• be whistling in the dark
• be wide of the mark
• be wide open
• be wide open to
• be wide open to abuse
• be wide open to [abuse/criticism etc.]
• be wide open to criticism
• be wise to
• be wise to someone
• be wise to something
• be with child
• be within an ace of
• be within an ace of doing something
• be within an ace of something
• be worlds apart
• be worried out of mind
• be worried out of your mind