choke up

verb5

1. •
   To (temporarily) lose one's power of speech, because of strong emotion.

   • Hearing that song always makes me choke up.
2. •
   To cause (a person) temporarily to lose the power of speech, because of strong emotion.

   • It chokes me up to think about how he died.
3. •
   To hold the bat higher (farther from the knob) than is normal.
4. •
   To block up; to cause something to be blocked.

   • The bodies choked up the entrance, barring the egress of those behind. — 1904
5. •
   To cease talking.