bust a gut
Also, burst a gut.
Exert one-self to the utmost. For example, He was busting a gut trying to please her . This hyperbolic term alludes to hurting one’s mid-section through physical straining. The first slangy term dates from the early 1900s, the variant from about 1700. For a synonym, see break one’s ass
Explode with strong feeling, especially laughter or anger. For example, Gene almost bust a gut laughing, or The foreman will burst a gut when he learns that the machine isn’t repaired. The former dates from the late 1800s, the latter from about 1940.
bust a move
Informal. to burst. to go bankrupt. to collapse from the strain of making a supreme effort: She was determined to make straight A’s or bust. Cards. Draw Poker. to fail to make a flush or straight by one card. Blackjack. to draw cards exceeding the count of 21. Informal. to burst. to bankrupt; ruin financially. […]
bust balls Contemporary Examples The Killing of a Park Ranger on Mount Rainier Reminds Us to Help Returning Soldiers Benjamin Tupper January 2, 2012
bust caps To fire the main gun of a tank To have a firefight (1970s+ Army)