I ready lesson 19 similes metaphors. Ollie's mouth was a trap that held a giant stick

This is a metaphor.

Explanation:

Metaphors are figures of speech that directly state that something is another thing - like "he is a snail." Similes, however, compare the two objects without stating they are the same - like "he is like a snail." They key difference is the use of comparing words, like "like," "as," etc.