1. [late 19C–1950s] (US tramp, also gay-catter) a young or inexperienced tramp.
2. [late 19C–1950s] (US tramp, also cat) a hobo who only accepts occasional or seasonal work.
3. [1900s–40s] (US Und.) the junior member of a criminal gang, employed to run errands or spy out possible crimes.
4. [1920s–30s] (US tramp) a tramp’s younger, homosexual companion.
5. [1920s] (US Und.) a thief who only works when he needs money.
6. (US Und.) a safebreaker.