[thaumasiotes]

What country are you from? I would consider "tiddies" to be a somewhat strange misspelling of "titties".

Compare https://en.wiktionary.org/wiki/titty_bar .

[SV_BubbleTime]

It’s internet slang. Looks like the earliest urban dictionary entry is 2012.

https://www.urbandictionary.com/define.php?term=tiddy

[fsckboy]

just for the record, nitty gritty has become niddy griddy