A Dictionary of Dream Symbols

by Eric Ackroyd
(1) Monkeys seem to spend a lot of time playing, and may therefore symbolize not taking life too seriously; letting yourself go (along with Nature).

(2) Monkeys are associated with mischief and may therefore symbolize unconscious forces that are ‘up to no good’ - because you have deprived them of their proper place in your conscious life.

(3) They may symbolize sexuality - your own. So, why does sexuality disgust you?

The Mystic Dream Book

by Stephen Girard
To dream of these mischievous creatures, is ominous of evil; they announce deceit in love, undutiful children, malicious enemies, and an attack by thieves.

The Fabric of Dream

by Katherine Taylor Craig
See Ape.