EXAMPLES FROM THE WEB FOR BUCK UP
Buck up, old girl, it is never so bad that it might not be worse!
She is a nice lady and tries to buck up for her children's sake, she says.
Nobody but a fool out of college cares to buck up against them.
I say, I can't carry you now,' I said; 'for God's sake, buck up.'
Let them hate us, and say so; it'll teach us to buck up; and that's what really matters.'
He adjured Pixie repeatedly, and with unction, to “Buck up!”
We have to buck up, and grin and bear it, and make the best of a bad bargain.
You 'd think a man might buck up in response to that, wouldnt you?
You must buck up, little woman, and show them what you can do!
Just buck up and be a man, and you'll pull it off magnificently.
"male deer," c.1300, earlier "male goat;" from Old English bucca "male goat," from Proto-Germanic *bukkon (cf. Old Saxon buck, Middle Dutch boc, Dutch bok, Old High German boc, German Bock, Old Norse bokkr), perhaps from a PIE root *bhugo (cf. Avestan buza "buck, goat," Armenian buc "lamb"), but some speculate that it is from a lost pre-Germanic language. Barnhart says Old English buc "male deer," listed in some sources, is a "ghost word or scribal error."
Meaning "dollar" is 1856, American English, perhaps an abbreviation of buckskin, a unit of trade among Indians and Europeans in frontier days, attested in this sense from 1748. Pass the buck is first recorded in the literal sense 1865, American English:
Perhaps originally especially a buck-handled knife. The figurative sense of "shift responsibility" is first recorded 1912. Buck private is recorded by 1870s, of uncertain signification.