Generallyapplies to men.
To be in the habit of continually playing with one's "hose" like a monkey...
Also applies to most types of useless or ineffective behavior.
See "wanker"
A tree surgeon who is off work due to injury, illness, or bad weather. Also, from the proverb: 'House monkey have plenty time procrastinate about study'.
Katie hates being a house monkey.... she can't wait until her knee is fixed so she canget back up a tree.