川柳（せんりゅう）

（しゃしんはwikipediaから)

みなさんは川柳（せんりゅう）をしっていますか？川柳（せんりゅう）は日本の短い（みじかい：short）詩（し：poet）です。

It consists of 3 lines with 17 (5-7-5) or more/fewer morae. The below is the example from Wikipedia.

どろぼうを

とらえてみれば

わがこなり

The robber,

when I catch,

my own son

The subject of senryu is based on human nature, and it's usually satirical/ironic.
There are people who make senryu in English. Click here and here.

Senryu is similar to haiku. However, haiku usually have seasonal expressions which senryu don't have to have.