What is Halina?
1.
Internet troll. Spends lonely existence on various internet forums with the sole purpose of slagging off those it secretly envies.
Nice internet person: "I really like Kaiser Chiefs"
Halina: "Kaiser Chiefs suck and so does your music taste"
See
2.
(noun) closet lesbian who confuses guys by giving them really good hugs
"damn, there must be a lot of halinas at wellsley"