屌 (diǎo) is a highly vulgar Chinese word. Its literal meaning is 'penis', but in modern slang it is commonly used as an adjective meaning 'cool' or 'awesome' (e.g. 很屌), or as a prefix in vulgar compounds like 屌丝 (loser) and 屌话 (foul language). In Cantonese it is also a verb meaning 'to fuck'. This row is labeled as a noun, but actual usage spans parts of speech. Be extremely careful with this word — it is offensive in most contexts and should be avoided in polite conversation.