Much like a typo when one is typing, A talko is when one fucks up in general speech.
Oh... shit.. sorry.. Talko
A mistaken word uttered into a conversation
A verbal typo
Joe: It's daylight savings time. I'd better set my cock back an hour.
Jane: Excuse me???
Joe: Oh jeez... I meant "clock". That was a talko.
Much like a typo, it's when you stumble with your words or say one thing when you meant to say another.
Guy 1: We were supposed to goto the baseball glame, uhh, I mean game.
Guy 2: Talko!
A gay sex offender who happens to be a 35 year old virgin who watches and listens to you while you eat tacos and tells you that they've been watching with a definition.
Check out the old gay virgin talko behind us. I think its hungry and wants some free food and iced tea.