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.
