english
1
general::
see under ONLY TOO.
American Heritage Idioms
2
general::
Phrase(s): know something only too well to know something very well; to know something from unpleasant experience. (Note the variation in the examples.) • I know the problem only too well. • I know only too well the kind of problem you must face.
McGrawhill's American Idioms And Phrasal Verbs