Unionen, Sweden's largest union, is encouraging members to call up when male colleagues give them unsolicited lectures on things they already understand.
The organisation, which represents 600,000 private sector workers, launched the advice line on Monday and said it will be open from 10am to 4pm everyday for a week as part of a campaign to highlight and stamp out the insidious and damaging practice.
For those who might not be familiar with the modern portmanteau, the union defined mansplaining as when "a man explains something to a woman without being asked, particularly something which she might already know more about than the man".
Unionen said the commonplace practice diminishes women, by making them appear less competent than they are.
If every time you talk to a co-worker you get a phone call from Mansplaining Central, you will most definitely stop speaking to the female staff. You will in fact shun them at all costs. Simple self defense.