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.