Difference between Choke Up and Chicken Out

CHOKE UP vs CHICKEN OUT: VERB

To hold the bat higher (farther from the knob) than is normal.
To block, to block up (figuratively).
To block up, to cause something to be blocked.
To (temporarily) lose one's power of speech, because of embarrassment, fear etc.
Obstruct

To shy away from a daring task; to decline, refuse, or avoid something due to fear or uncertainty.
Remove oneself from an obligation

Boil over, Rattle off, Swear off, Blow off, Tear into, Cry out, Rough up, Wear thin, Sneak away, Keep quiet, Lash out, Sneak off, Lug, Block, Stuff

Be sick, Health problem, Defail, Keep apart, Concentrate on, Hang back, Remord, Eat into, Move back, Keep down, Score off, Back down, Bow out, Pull out, Back off

Break wind, Undercry, Let loose, Gobble up, Rattle off, Tear into, Cry out, Rough up, Wear thin, Sneak away, Keep quiet, Lash out, Sneak off, Block, Stuff

Send away, Be sick, Health problem, Defail, Keep apart, Concentrate on, Hang back, Remord, Eat into, Move back, Keep down, Score off, Bow out, Pull out, Back off

Under no circumstances allow the exhaust from the blastpipe to pass through the mesh as oil will quickly cause it to choke up.
Belle myself but the preamp will add a bit of mid range and compression, which can make Muffs choke up a bit.
The WWE star-turned-actor often visits nearby children's hospitals whenever he's on set, and his latest visit might make you choke up.
While relating this all to me, he starts to choke up a little.
Yesterday, I saw David Ourlicht choke up in tears before dozens of journalists and cameramen.
Just thinking about gifting this to someone is making me choke up.
Even looking at a choker makes you, well, choke up.
Just thinking about her makes me choke up.
CPAP but without it I choke up and have a terrible night and wake up just exhausted.

Pull the chicken out of the refrigerator an hour before you plan to roast it.
Did you forget to pull the chicken out of the freezer again?
Leo: Mario, If we chicken out, we die.
Come back, take the chicken out of the oven.
Take chicken out of refrigerator an hour before cooking and let it come to room temperature.
Right now, before you chicken out and change your mind.
Vulture when they chicken out of a fight.
And if you, ahem, chicken out spatchcock-wise, Raichlen says you can use the under-brick technique with boneless, skinless chicken breasts.
Chicken: Negotiators propose extreme measures, often bluffs, to force the other party to chicken out and give them what they want.
Try flattening the chicken out to get a consistent thickness for the whole chicken breast.