big head

• (sense 1) IPA^(key): /ˌbɪɡ ˈhɛd/
• (sense 2) IPA^(key): /ˈbɪɡˌhɛd/

big head (plural big heads)

1. An inflated ego, an exaggerated belief in one's own importance.
   • 1995, HAL Laboratory, EarthBound, Nintendo, Super Nintendo Entertainment System:

     Don't let the Mayor's compliments give you a big head.

   He has gotten a little success, and a big head to go with it.

2. (idiomatic, usually humorous) The brain, as opposed to the penis, little head; rational thought, as opposed to lust.
   • 2022 April 4, Joe Giordano, Appointment with ISIL, Rogue Phoenix Press, →ISBN:

     "I wasn't thinking." "Oh, you were thinking, just not with your big head. [...] A sexy skirt catches your eye, and you're blind to what's in front of you."

3. (Jamaica, slang) to be under the effect of cannabis.
4. Alternative spelling of bighead