A heavy Dutch beer; Upsee Freese a Friesland strong ale; Upsee English, a strong English ale. Upsee Dutch also means tipsy, stupid with drink.
I do not like the dulness of your eye, It hath a heavy cast; `tis upsee-Dutch, And says you are a lumpish whoremaster.
Yet whoop, Barnaby! off with thy liquor, Drink upsees out, and a flg for the vicar.
“Teach me how to take the German upsy freeze, the Danish rouser, the
Switzer's stoop of Rhenish.” —
Source: Dictionary of Phrase and Fable, E. Cobham Brewer, 1894
More on Upsee-Dutch from Infoplease: