Worries, usually about performing the act of sex or urination, that cause a person to have an inability to properly execute these functions.
"How was your date last night?"
"It was awful!"
"What, no sex?"
"No dude! Jane was so hot, I got performance anxiety. Then she just left."
"Damn, you're a loser, Jon!"
"Hey man! Stop watching me pee! You're giving me performance anxiety"
A phrase used to describe a person who's ears stick straight out from their head (at about a 90-degree angle) and are usually quite large in size as well.
Wow! Look at George W. Bush's ears! He's definitely a taxicab with the doors open!