expression, noun
art of getting along in the world; knack for navigating life
Figurative expression likening social navigation to swimming; used for the skill of managing relationships, career, and life's challenges. The literal meaning 'how to swim' is also present but less common.
See also: 遊泳 (ゆうえい)
社会人としての遊泳術を身につけるのは簡単ではない。
It's not easy to acquire the art of getting along in the world as a working adult.
彼は遊泳術に長けていて、どんな職場でもうまくやっていく。
He is skilled at navigating life and gets along well in any workplace.
遊泳 means 'swimming' in a general sense; 遊泳術 adds 術 (technique/art) to emphasize the skill aspect, often used metaphorically.
Compound of 遊泳 (swimming) and 術 (technique, art). The figurative sense likely developed from the idea of swimming through the complexities of social life.