Someone who is the # 1 buzzkiller at a party or social event. Used as a noun.
The party was about to get started before Nate a.k.a Captain Buzzkill lectured us on why we shouldn't drink alcohol.
Someone who is addicted to getting head.
Girls love Metaphor and I love em back, addicted to getting head, chicks call me the brainiac.
From the Boondocks on Adult Swim