glacial minute
a noun referring to a long period of time.
Sally: "hey dude! i'll be there in a glacial minute."
(3 hours later)
Sally: "hey dude, i'm here."
Lester: " jeez sally, what took you so long."
(3 hours later)
Sally: "hey dude, i'm here."
Lester: " jeez sally, what took you so long."