Schmendrick (n)

Schmendrick (שמענדריק) is Yiddish for a foolish or contemptible person (OED).

In addition, according to Joys of Yiddish by Leo Rosten, another definition is “an apprentice schlemiel.”

For more on schlemiels, see: schlemazel.

ferhoodle (v)

ferhoodles; ferhoodling; easily a noun or adjective, pro ratus nati:

To confuse or mix up something in a particularly bumbling way.

Cf.: fobdoodle, kerfuffle, jobbernowl, et alia.