It is what happens to a
man when he gets pussy whipped. It turns men into blithering
idiots who do things against known
logic.
Ex. 1 - That poor Ivantang keeps on going back to that
chick even though he knows she'll
never leave her boyfriend.
Ex. 2 - She's seeing some other dude, he knows about it and he's still doing
Christmas with her? He's been Ivantanged!