Swallowing a bomb

Suppressing your anger when on the edge of exploding, especially when you know it's not worth it, and moving on.

Matt: You could see the fire in John's eyes. He paused for a moment, as if swallowing a bomb, and then let it go.

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James: Dustin swallowed a bomb when he bit into his donut that I poured salt all over while he was getting a drink.