Anonymous

(poker slang) A community card (usually the turn or the river) which does not improve a player's hand. https://en.wiktionary.org/wiki/brick http://www.rapdict.org/Brick

Anonymous

an unintelligent person. Derived from "dumb as a brick." http://onlineslangdictionary.com/meaning...

Anonymous

It could mean that you are a good friend or it could mean that you are thick as a brick. i.e. stupid.

Anonymous

The answer from @Chris Ancor is exactly right, but calling someone a 'brick' is quite old-fashioned these days. You used to see it in children's stories in the mid 20th century but I don't think I've seen it much, if at all, since about 1970.

Anonymous

A good solid reliable friend.