the thing is

1.
globalinformalcolloquialspoken
- A discourse marker used to introduce the main point, conclusion, explanation, or contrast that the speaker wishes to emphasize.
- A phrase used to signal that what follows is the important or decisive consideration in the discussion.
2.
globalneutral
- A placeholder noun referring to an unspecified object, matter, situation, or problem when the speaker either cannot name it precisely or chooses not to.
3.
globalinformal
- An introductory phrase that frames a difficulty, obstacle, or complicating factor that affects the situation under discussion.

Examples: