gag on (something)

gag on (something)

To have difficulty swallowing something. I can't possibly swallow a pill that big without gagging on it. Sounds like the cat is gagging on another hairball.
See also: gag, on

gag on something

to choke on something; to retch on something. The dog is gagging on whatever you gave her. This fish is good, but I hope I don't gag on a bone.
See also: gag, on