"Not Safe for Work" is a warning/disclaimer that people put on pictures or website links; it usually means the picture or link displays "adult" content, which could be either gore or nudity/sexuality ... the sort of thing you wouldn't necessarily want to be on your screen when your boss walks up behind you.
What any given person considers "not safe for work" can vary considerably, though most people would agree that anything showing sexual content of any kind ... even just nudity, though this might be acceptable if it's, say, Benton's Persephone and you work at a museum ... is probably "not safe for work".
Rogaine is considered to be a safe product for people to use. This product has been clinically tested and proven to work.
Ammonium chloride is safe to use for wood burning projects, but it is not considered food safe.
Start with 5g and work your way up. The high lasts for a while and is generally considered unpleasant. Be safe.
Yes, the use of infrared technology is generally considered safe in this application.
Only encrypted emails are considered reasonably safe.
Very Safe.
coolgardie safe is gay
Online banking with any major bank is considered safe, though nothing is considered 100% secure.
There are a few brands of car seats which are considered to be very safe. These are Brittax, Concord and Obaby. Another make considered to be safe is Graco.
none
yes, they are considered safe to humans
Some legislators are considered electorally safe because they are popular. They are considered that because they would likely win any election.