n. 25B6; adjective pat answers : GLIB, simplistic, facile, unconvincing.
25B6; adverb his reply came rather pat : OPPORTUNELY, conveniently, at just/exactly the right moment, expediently, favourably, appropriately, fittingly, auspiciously, providentially, felicitously, propitiously.
25A0; off pat WORD-PERFECT, by heart, by rote, by memory, parrot-fashion.
25A0; get something off pat MEMORIZE, commit to memory, remember, learn by heart, learn (by rote).