tits

plural noun

a small songbird that searches acrobatically for insects among foliage and branches.

mid 16th century: probably of Scandinavian origin and related to Icelandic titlingur ‘sparrow’; compare with titling² and titmouse. Earlier senses were ‘small horse’ and ‘girl’; the current sense dates from the early 18th century.

1. a woman's breast.
2. a button that is pushed to fire a gun or release a bomb.

Old English tit ‘teat, nipple’, of Germanic origin; related to Dutch tit and German Zitze . The vulgar slang use was originally US and dates from the early 20th century.