French Toast, Ballpoint pen, hair spray, deviled eggs, and butterfly.
A pun is a play on words, which is shown/represented within a picture or just simply a statement. Puns is usually a word taken literally, such as a butterfly, it can be represented within a picture of a fly and a bar butter. Simple words like these that are taken literal are considered puns. It can be used in a funny way or in a offensive way, a pun is a joke, with different meanings of the word used. These are used in Photography because you can take a picture of the pun and use Photoshop to put them all together. Puns are used in industries like film and tv as well as photography.