A “brick” or “blank” is a term used to describe a card that is meaningless. It helps no one’s hand and does not connect with any other cards.
So, if you felt like you had the best hand on the flop, then a brick on the turn won’t change your opinion about still having the best hand. For example: If you have an 8 and a 9 in your hand and the next card is a 2, this would be a brick since it does not help your hand.
EXAMPLE “I let out a sigh of relief after I was all-in on the turn with an overpair but my opponent still had outs as he was chasing a flush draw but the river bricked off.”