IDRM
Example:
Tim: Where did you put the box of food.
Bob: Might be in the kitchen but idrm.
Tim: Damn that reads better than Idr...
Tim: Where did you put the box of food.
Bob: Might be in the kitchen but idrm.
Tim: Damn that reads better than Idr...
idrm
idrm is a misspelling of, "idrk" which means "I don't really know." This misspelling came into play because the letters 'k' and 'm' are close to each other on most keyboards, making is irresistible for most fools to make the mistake.