Top definition
An obsolete term for smoking a cigarette; cigarette's used to have Fiberglass filters, hence the term.
"I really need to go eat glass in my break."

"Eating glass can kill you."
by Jordan-ray July 15, 2006
Get the mug
Get a Eating Glass mug for your buddy Georges.
2
A metaphor for attempting something extremely difficult, with a steep learning curve, or requiring a lot of practice to perfect
Elon Musk compared being an entrepreneur to "eating glass"

"Man, winning the new boss fight is tough. It's like eating glass!"
by Killer DM March 09, 2019
Get the mug
Get a Eating Glass mug for your friend Vivek.
3
When you smash your own teeth in with a hammer and swallow your teeth fragments
Mother: Billy, breakfast is ready!
Billy: Just a second mom i need to finish Eating Glass!
via giphy
by bjac0 September 04, 2018
Get the mug
Get a Eating Glass mug for your daughter-in-law Riley.