The monkey emoji from a guy can have a variety of meanings. Generally speaking, it can be used to represent a playful attitude. For example, if a guy texts you a monkey emoji, it can suggest that he is up for some lighthearted fun.
It can also suggest that a person is silly or mischievous. It might even be used to point out a joke or make fun of a situation, especially if combined with a witty or ironic comment.
Overall, the monkey emoji from a guy typically communicates a message of fun and playfulness.