As a Noun: 1. The state of a man's penis being stiff, swollen, and sticking up. For some Auslan users this is a vulgar sign. Formal English = erection. Vulgar English = stiff, boner. Idiomatic English = hard on. As a Verb or Adjective: 1. Of a man's penis, to become stiff, swollen, and sticking up. For some Auslan users this is a vulgar sign. Formal English = become erect, get an erection. Vulgar English = become stiff, get a stiff, get a boner. Idiomatic English = get a hard on. 2. Of a man's penis, to be stiff, swollen, and sticking up. For some Auslan users this is a vulgar sign. Formal English = (be) erect. Vulgar English = (be) stiff. Idiomatic English = have a hard on.