slush bucket

[lukre]

What does a "slush bucket" mean?
For instance in this situation: a girl is drinking milkshake and a friend says to her "slush bucket!".
Does it refer to the sound she's making while drinking on a straw or thet she is drinking greedily...
Can you please give me a synonym?
Thanx!

[Angela27]

I have never heard the term slush bucket for someone making a noise whilst eating/drinking but it does seem to be in context of making a noise.

I don't think there is a suitable synonym, or I can't think of one, but the sentence would go something like

Don't make such a noise whilst drinking that milkshake