B: "You are NOT a nerd. You're an intellectual badass... get it right."
A: "Oh give it a rest IBA."
When a guy or girl is so sketchy, sleazy or nasty that you feel infected or disgusted by just being around them.
Can apply to someone who is not actually sleazy but appears to be.
She sat beside me in math class. IBA to the max!
I felt IBA around him, he's so dirty
Guy: This nerd has a serious case of IBAS
Guy 1: yes he does, its a very serious epidemic
Nerd: fuck you guys, give me your address