A type of word play wherein one word has two meanings or where similar-sounding words are exploited, is known as pun. This gives an ambiguity to the sentence, which is purposely added for a humorous or rhetorical effect. According to Ambrose Bierce, pun is "A form of wit, to which wise men stoop and fools aspire". Literary figures like Shakespeare, Wordsworth, Oscar Wilde, and George Carlin were famous for its use in their works. This so-called lowbrow humorous device works on double entendre.
Types of Puns
Visual Pun: Using a picture to convey the pun is quite popular