what is "witch's brew"? Witch's brew, what does brew mean in here?

"send me off the deep end", what does it mean? What does it mean by saying "You think Katherine is going to send me off the deep end, don't you?"

What does "engage" mean? What does "engage" mean in e.g. "engage your customer" and how to use "engage with" in this scenario?

perfect wave, what does this mean? He want's nothing to do with the council. He's too preoccupied finding the perfect wave.

What does "hold up" mean in this dialogue? A: How is Jeremy? B: Hold up in his room.B: Hold up in his room, not holding

What does "utility door" mean? Context: a house is on fire and someone was trapped inside. The person ouside the house says to another person that there's a utility door arouns side of the building.

Don't start with me. What does "Don't start with me!" mean?

utility door what is utility door?

What does "reign it in" mean? What does "reign it in" mean in below context? The Stephen you know was a "good behavior" Stephen, "reign it in" Stephen, "fight against his nature to an annoyingly absessive level" Stephen.