Shitless

Origin

From shit + -less.

Full definition of shitless

Adjective

1. (vulgar) Having an empty bowel; greatly frightened; see usage notes below.He was scared shitless.

Usage notes

This term is primarily found in the verb phrase scare shitless ("to frighten (a person) to the point that he vacates his bowels") and its participial adjective scared shitless ("frightened to the point that one has vacated one's bowels"). It may be considered a more evocative variant of certain uses of witless and speechless.