What is Mo' Tussin?
1.
v. To make a bottled liquid last longer by adding water and shaking the bottle, thereby collecting the residue from the sides of the bottle. From the 1999
1) Orig. Quote: "And if you bout to run out? Put water in it, shake it up, mo'
Tussin !"
2) "Are you sure we're out of cough syrup? Did you mo' tussin it?"
See