twotblocker 

noun
1. When a man is flirting with a woman. Another man sees that they are flirting and begins flirting with that women, exclusively to the first man. This prevents the first man from getting sex with the woman.
2. A man who is trying to prevent another man from getting sex. He does this by flirting with the girl the original man planned on having sex with.

1. I was real close to getting her in bed, until Johnny walked in and turned it into a real twotblocker.
2. That chick had a thing for me, until the twotblocker started talking to her.

twotblocker by fushahb20815 May 17, 2009

TwitFlocker 

Bullshit placeholder meme invented by the Texas-based 'Global Language Monitor' to refer to the 'next big social media thing'(tm) to change all our lives.

Because people are sooo predictable... aren't they?

We were gonna arrange the party on 'TwitFlocker', but instead we worked on an encryted and distributed IRC so we could unleash LOIC DDOS Wikileaks revenge attacks on Paypal/VISA/Mastercard et al in a more reliable and coordinated fashion - and not get taken down at the first sign of sabre-rattling from the US government.

TwitFlocker by ahh_but_of_course December 10, 2010

Twotblock 

when one girl really wants to screw the quarterback but her friend ruins it by saying something that makes him want to mingle elsewhere.

What the hell julie?! you totally just twotblocked me!

Twotblock by the deconstructionalizer March 26, 2010