talk up's Usage Examples:

the early 1980s, KSJS was heavily-formatted, with students learning to "talk up" records, play public service announcements at appropriate times and even.

convention visiting from the fictional town of Birdsburg, Missouri who talk up their town: "You should pay it a visit," he said.

Synonyms:

pontificate; level; soliloquize; chat up; dissertate; soliloquise; cheek; monologuize; romance; mash; dogmatize; dogmatise; intercommunicate; spiel; dish the dirt; talk turkey; philander; dally; discourse; continue; converse; flirt; gossip; carry on; monologuise; butterfly; coquet; speak; coquette; talk down; hold forth; rap; proceed; go on; communicate; orate;

Antonyms:

seal; lock; bolt; cork; bar;