drain (someone or something) of (something)
1. To cause someone or something to lose some ability or quality, often energy. Eleanor has such a pessimistic attitude that being around her just drains me of energy.
2. To empty or remove something (often a liquid) from something else. I always have to drain this soup of its broth because my daughter only likes the noodles.
drain someone or something of something
Fig. to exhaust someone or something of something, such as energy, motivation, etc. This day has drained me of all my motivation. The first performance drained the cast of all its energy.
drain something of something
to empty something out of something. He drained the glass of the remaining beer.