A berry (usually a strawberry due to its size) dipped flamboyantly in chocolate, served with powdered sugar and with the finesse that could only be provided by someone who frequently takes the male phallus up his rectum.
'Hey man, how good were those Gayberries at the brunch this morning!'
'Shit man, I only got to eat one Gayberry, it tasted like the first time I heard the beatles'
'YoChad, I wish I was gay so my chocolate strawberries tasted like that, my wife says mine taste like shit'
Gayber/gaybers gaybers are people who try to force other people to be gay, this is most commonly found in friend groups. It is a way for gay people to try and FORCE their gayness onto others. Some gay people just think that they can change their friends sexuality because they prefer gay people over straight people, this often also happens in religion.
friend: Hey fred, have you ever considered being gay like me?
fred: No stop being a gaybers, I'm not a gay person, stop trying to force your sexuality on me