yak up

yak it up

1. To vomit what one had previously eaten. Don't let the dog eat that, or he'll spend the rest of the afternoon yakking it up! That fish isn't sitting right in my stomach. I feel like I might have to yak it up.
2. To talk ceaselessly or at great length (about something). My dad has no trouble yakking it up about the time he spent traveling around South America. I was worried my guest wouldn't have much to say on the topic, but she yakked it up for a solid hour.
3. To converse (with someone) very easily and at length. She spent the whole party yakking it up with one of the producers. She was relieved to see her boyfriend yakking it up with her dad and brothers.
See also: up, yak

yak up

1. slang To vomit (something). A noun or pronoun can be used between "yak" and "up." The dog has this nasty habit of eating candles off the table and then yakking them up all over the carpet later. We both yakked up our dinner the whole night, so there was definitely something wrong with what they served us.
2. slang To talk ceaselessly or at great length (about something). My dad can always yak up a storm about the time he spent traveling around South America. Sarah always ends up yakking up something controversial whenever she's around my family.
See also: up, yak
Farlex Dictionary of Idioms.

yack something up

Inf. to talk a great deal [about someone or something]. (The something is often it.) She yacked the concert up endlessly. Sally yacked up the concert, trying to get people to attend. Yack it up and see if you can get people to attend.
See also: up, yack
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.

yak up

or yack up
v. Slang
To eject some contents of the stomach by vomiting: He was so sick today that he yakked up his lunch. The dog ate some leather and then yakked it up.
See also: up, yak
The American Heritage® Dictionary of Phrasal Verbs.

yak it up

tv. to talk incessantly or a lot. Why don’t you all just yak it up while I get ready to give the talk?
See also: up, yak
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions
See also:
  • yak it up
  • yack up
  • talk to Ralph on the big white (tele)phone
  • barf bag
  • buicks
  • talk to Huey on the big white (tele)phone
  • return
  • chuck up
  • purge
  • binge and purge