That threatening feeling you get in the wake of a bowel movement. Typically an urgent feeling which results in immediate vacation of a place, task or conversation that you are in. Threatening bowel movements maystrike at inappropriate times. You may experience the intense feeling without prior knowledge that you were anticipating a bowel movement.
Susie: How is your steak, Sharon?
Sharon: uh.. *abruptly leaves*
5 mins later
Susie: Are you okay?
Sharon: Yeah just had a major threatening bowel movement (TBM). But it has been expelled.
A Taco Bell Mom or TBM is a mom hitting on another mom's husband inside of taco bell.
Usually started with a stare down and proceded with smiles, hair swooshing and laughter to draw attention from the dad while the other mom rolls her eyes.
Beware dad's of the TBM's...they're out to getcha.
I saw this Taco Bell Mom (TBM) and my daughter looked up and kicked me.