What is the meaning of Puer?

Dung (of dogs, fowls, etc) used in tanning, after applying lime, to soften skins.

Alternative form of pu'er

Ellipsis of puer aeternus.

to stink, to smell (bad)

to stink of

pure

a child; chit

a boy, lad (typically between ages 7-14 but could be younger) (older than an infans but younger than an adulescens)

a male servant or page; slave

a bachelor

boyhood (ex: in puero, "in his boyhood" or "as a boy")

few, some, a few

Source: wiktionary.org