the act of puking your brains out after drinking heavily, then come back and start drinking all over again with a empty stomach.
Its best to yack and come back if:
-your drinking all day,
-then go to a chinese buffet.
this is what should follow that:
-then go to the parking lot,
-stick your fingers down your throat
-puke
-then go back inside and eat and drink again
by M2million December 08, 2006
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1. When a male is t-bagging a woman and before he ejaculates turns and shits on her face.
2. Also may be used as a way to express anger.
1. "Hey Bill last night Linda let me do shit-cock-yack balls, and it was fantastic."
2. "Shit-cock-yack-balls! I died in Call of Duty again."
by Steim_Time March 18, 2009
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The process of sticking a live 12v cable in your ass and powering it up untill the shock causes you to ejaculate.
I got home yesterday from a long day of being an electrician stuck 12v up the dot and had a rusty yack.
by Wingaz November 07, 2019
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n. 1) A person whose tendency is to talk non-stop for about half of his/her working day about things that have nothing to do with their job and everything to do about their personal lives.
Characteristics:
- Usually laughs at anything and everything that involves him/her.
- Usually a prototypical jackass, one who reports a laundry list of problems but has absolutely no solutions.
- Obese
- Kiss-ass
1)The group was extremely productive until Cap'n Yack made his way into the meeting. I never knew you could find out 5 different ways your wife can cheat on you in a utilities meeting.

2) I couldn't get anything done today because fat ass Cap'n Yack was holding court in his office. 4 people were sitting in his office talking non-stop, it was a Yack Fest!
by dd0022 March 02, 2005
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1. Fat ass
2. Constantly talks in a work environment about subject material having nothing to do with work and everything to do about their personal lives.
3. Usually has thick coat of brown on their nose from undisclosed origins.
The meeting was very productive until Cap'n Yack arrived. Didn't know you could find so much out about how to be a loser... and he was only there for 30 minutes!
by dd0022 March 04, 2005
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When a dude explodes all over his lovely lady, face, tits and all.
Me: Yo, how was your date last night
Jon: I baby yacked all over his face.
Me: Did you give her baby wipes?
Jon: Nah, I told that trick to take a shower
Me: You savage.
by Dirty JonR December 05, 2020
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