choke back

Related to choke back: choke off

choke back

To try to keep from expelling something, such as words or tears. A noun or pronoun can be used between "choke" and "back." I choked back a question about her boyfriend as soon as I remembered that they had broken up. I didn't feel sick until after the ceremony had started, so I had to choke back vomit the entire time.
See also: back, choke
Farlex Dictionary of Idioms.

choke something back

to fight hard to keep something from coming out of one's mouth, such as sobs, tears, angry words, vomit, etc. I tried to choke the unpleasant words back, but I could not. She choked back her grief, but it came forth nonetheless. I could hardly choke my tears back.
See also: back, choke
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.

choke back

Suppress, as in He choked back his tears. [Late 1800s]
See also: back, choke
The American Heritage® Dictionary of Idioms by Christine Ammer.

choke back

v.
To suppress or hold something back, especially with great effort: I choked back tears as I told my family the sad news.
See also: back, choke
The American Heritage® Dictionary of Phrasal Verbs.
See also:
  • cut back
  • brush back
  • claw back
  • bring back
  • chop back
  • buck off
  • echo back to
  • be/go back to square one
  • come back and see us
  • back to square one