“I'm allergic to rocks hitting me in the face.”
“I guess you could say I'm allergic to sunlight. If I'm exposed to it, it could kill me.”
“I'm allergic to stupidity.”
“I'm allergic to sad memories. It's the worst.”
“I'm going to put corn and hot sauce on your wiener, and then I'll hit you in the face with it. Hit you in the face with your corny wiener.”
“Talking about myself makes me feel like I'm having an allergic reaction, especially when compliments are involved.”