The Tunc of a glass beaker is a term colloquial to the Midlands of the United Kingdom that is used to describe the thick deposit of glass that forms the base of the vessel.
There are two possible origins for the word:
The word is onomatopoeic and derives from the sound produced when the vessel comes into contact with a horizontal wooden bar surface. As tunk with a 'k' is defined as "a sharp blow; a thump", it has been argued that this theory does not give an adequate explanation as to why the word ends with a 'c' and not a 'k' (an unusual spelling considering that the word first appeared in common usage in the United Kingdom).
The word derives from the Latin word 'tunc' which means 'then' (as in, when the tunc is reached, it is then time for another drink). However, this is a somewhat tenuous line of reasoning and relies, for the most part, on inference.
With both theories being feasible but ultimately flawed, it would be wrong to definitively accept either, so the etymology of the word remains ambiguous.
Tunç is a Turkish name and may refer to:
Oh, no no no
Can I get a ... ?
I know you're feeling my show time, yeah, yeah
Get ready baby, this is about to go down, go down
I know you got the word that big daddy is in town, town,
town
I know you got your best song for your boy
And I got some new hits you gonna enhoy, oh
Starting with your favorite song
Girl we're about to get it on
It's show time, I'm gonna do the stage, girl I wanna get
you screaming
It's show time, so get up off the seat, get up, I'm about
to give you ...
So get your hands in the air, I'm about to get it ... I
can see it
I know you feel about the show time
I need a standing ovation, yeah, I need