In the play-within-a-play, Tom Snout plays the wall which separates Pyramus' and Thisbe's gardens. In Pyramus and Thisbe, the two lovers whisper to each other through Snout's fingers (representing a chink in the wall). Snout has eight lines under the name of Tom Snout, and two lines as The Wall. He is the Wall for Act V-Scene 1.
Tom Snout was originally set to play Pyramus's father, but the need for a wall was greater, so he discharged The Wall. Snout is often portrayed as a reluctant actor and very frightened, but the other mechanicals (except Bottom and Quince) are usually much more frightened than Tom Snout.