adj smart; trim; spruce; jaunty; vain.
2. perk ·vi to exalt one's self; to bear one's self loftily.
3. perk ·vi to peer; to look inquisitively.
4. perk ·vt to make trim or smart; to straighten up; to erect; to make a jaunty or saucy display of; as, to perk the ears; to perk up one's head.