| four-letter word | |
| —n | |
| any of several short English words referring to sex or excrement: often used as swearwords and regarded generally as offensive or obscene | |
| a gadget; dingus; thingumbob. |
| a screen or mat covered with a dark material for shielding a camera lens from excess light or glare. |
four-letter word
Any of several short English words that are generally regarded as vulgar or obscene. For example, No four-letter words are permitted in this classroom. This expression is applied mostly to words describing excretory or sexual functions. [First half of 1900s]