A slip of the pen

описка Например: The mistake was not due to ignorance. It was just a slip of the pen. — Это не ошибка, говорящая о незнании, а просто описка.

Англо-русский фразеологический словарь
a slip of the pen
a slip of the tongue
a slip of a boy
a rejection slip
between the cup and the lip a morsel may slip
-a
-a-
a
a#
a-
a.
å
a 1
a and m
a and r
a babe in arms
a babe in the wood
a bachelor girl
a back number
a back-seat driver
a backroom boy
a bad actor
a bad beginning makes a bad ending
a bad character
a bad conscience
a bad deal
a bad debt
a bad egg
a bad hand at something
a bad job