tittie

[tit-ee]

titty

1

or tit·tie

[tit-ee]
noun, plural tit·ties. Scot. Informal.
  1. sister.

Origin of titty

1
1715–25; perhaps orig. form of sister in children's speech

titty

2
[tit-ee]
noun, plural tit·ties. Slang: Usually Vulgar.
  1. a breast or teat.

Origin of titty

2
First recorded in 1740–50; tit2 + -y2
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Word Origin and History for titties
n.

1746 (plural); see tit (n.1) + -ie.

Online Etymology Dictionary, © 2010 Douglas Harper