pat

(noun) the sound made by a gentle blow. Synonyms: rap, tap.

(noun) a light touch or stroke. Synonyms: tap, dab.

(verb) pat or squeeze fondly or playfully, especially under the chin. Synonyms: chuck.

(verb) hit lightly. Synonyms: dab. Example: "Pat him on the shoulder."

(adj) having only superficial plausibility. Synonyms: glib, slick. Examples: "Glib promises." "A slick commercial."

(adj) exactly suited to the occasion. Example: "A pat reply."

(adv) completely or perfectly. Examples: "He has the lesson pat." "Had the system down pat."