'Speaking of which' can be used to refer to something that has just been said. Other similar phrases are: by the way, incidentally, apropos, with regard to...:
When a transexual makes a profile on a straightdating site and uses acronyms and code words in their "about me" section to disguise the truth hoping to get matched with an unsuspecting member who is unfamiliar with the lingo.
Friend: Dude, I matched with this cute chick on Tender .
Me: let me see... I just read her profile. Its a dude
Friend: Bullshit! Why do you say that?
Me: it says "Po Tg" she is Speaking Tranish. It means she is Post Operation Trans Gender.
The fake, imitation accent people do to sound like indie singers when they sing. Often when people speak cursive the words are slurred, and hard to understand.