Synonyms for City slicker:

n.

urban warrior, townie, burgher, suburbanite, townspeople, townsfolk, citizen. city slicker (noun)
city boy.
sophisticated city person (noun)
townie, city boy.

Other synonyms:

suburbanite, townsfolk, townspeople, townie, burgher. urban warrior, citizen. Other relevant words:
townie, townspeople, burgher, suburbanite.