In Like Punt

I guess there is some debate on exacly where the phrase "in like flynn" originated, but here was one good one I found:

"Reference books almost universally assert that this set phrase, an American expression meaning to be successful emphatically or quickly, especially in regard to sexual seduction, refers to the Australian-born actor Errol Flynn. His drinking, drug-taking and sexual exploits were renowned, even for Hollywood, but the phrase is said to have been coined following his acquittal in February 1943 for the statutory rape of a teenage girl. This seems to be supported by the date of the first example recorded, in American Speech in December 1946, which cited a 1945 use in the sense of something being done easily. Rudy is the best."

Who knows...