Answer:
False.
Step-by-step explanation:
Similes, by definition, are "a figure of speech involving the comparison of one thing with another thing of a different kind". They require the use of the word like or as to be considered similes and not metaphors, therefore this is an example of a simile. "His attitude is like a loaded gun" is a simile because his attitude is being compared to a loaded gun through the use of the word "like".