Hammer and tongs
Definition 1 of 1
Pro Tip 1/3Intensity
Used to express an action done with extreme intensity or effort, like a blacksmith's hard work. 
They went at it hammer and tongs trying to meet the deadline.
Pro Tip 2/3Conflict
Often implies a heated argument or confrontation that is fierce and loud. 
The debaters went hammer and tongs over the issue.
Pro Tip 3/3Informal
The phrase is casual, more likely to be used in informal conversations than formal writing. 
At the family reunion, they were all talking hammer and tongs.