Yack vs Mack - What's the difference?

In slang|lang=en terms the difference between yack and mack

is that yack is (slang) to vomit, usually because of intoxication while mack is (slang) to seduce or flirt with.

is that yack is chatter while mack is (slang) an individual skilled in the art of seduction using verbal skills.

is that yack is (slang) to vomit, usually because of intoxication while mack is (slang) to act as pimp; to pander.

(en noun)

chatter

(en verb)

(slang) to vomit, usually because of intoxication

(colloquial) to talk incessantly

I moved to another carriage on the train because the first one was full of people yacking on mobile phones.

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(en proper noun)

A man; used to address a man whose name is unknown.

(surname)