To ruin, or attempt to ruin, someone's chances of pulling a member of the opposite sex. Can be intentional, accidental or reckless.
Roland introduced Claire to his friend, Jeremy. Jeremy called Claire "Dawn" by accident, as he thought that was her name. Claire looked at Roland confused.
Mobius438: i post yodas
StHFreebird: k
Mobius438: haha oh fuck
Mobius438: check that
Mobius438: i did NOT make that up
StHFreebird: no fucking way
Mobius438: srsly
StHFreebird: you did that
Mobius438: no man
Mobius438: http://www.urbandictionary.com/define.php?term=francisco
StHFreebird: WOW
Mobius438: i know
Mobius438: im lmao'ing
StHFreebird: wow i've never seen that expression used that way
Mobius438: laughing my ass offing
Mobius438: no it doesnt make much sense