A quiet word to an employee or aquaintance, suggesting that they'd best proceed with caution in respect of their current conduct or attitude, or they
may be in for an unpleasant surprise. The details of which
aren't actually set out by the giver of the warning, who may or
may not have control over their fate.
The
guy was certainly out of
line, there probably wasn't sufficient grounds for disciplinary
action, but he certainly got the gypsy's warning.