People push this in when they are annoyed, to make the feeling louder. It does not add a new meaning; it only turns up the heat, usually in front of a noun or an adjective: the frigging door, it’s frigging cold. It is a milder stand-in for a stronger swear word that teachers will not print. Informal, a bit angry, and not for class, emails, or someone’s grandparents. British and American speakers both use it, though actually some people still find even this “softer” form too rough. It has nothing to do with the warship called a frigate — they only look alike on the page.

該死的、他媽的（生氣時拿來加強語氣，比更重的髒話輕一點）