From WordNet (r) 3.0 (2006):
pat
adv 1: completely or perfectly; "he has the lesson pat"; "had
the system down pat"
adj 1: having only superficial plausibility; "glib promises"; "a
slick commercial" [syn: glib, pat, slick]
2: exactly suited to the occasion; "a pat reply"
n 1: the sound made by a gentle blow [syn: pat, rap, tap]
2: a light touch or stroke [syn: tap, pat, dab]
v 1: pat or squeeze fondly or playfully, especially under the
chin [syn: chuck, pat]
2: hit lightly; "pat him on the shoulder" [syn: dab, pat]