Green’s Dictionary of Slang

whang n.1

[whang v. (1)]

1. [late 18C+] a reverberating blow.

2. [mid-19C+] (Aus.) a large piece, a share, a portion.

3. [1930s–40s] (US, also whangdanger) an excellent thing; also as adj.

4. [1930s+] (orig. US) the penis, usu. large [the aggressive image of the penis as that which ‘hits’ the vagina].

In phrases