Green’s Dictionary of Slang

1. to act the toady.

1941

Baker Popular Dict. Aus. Sl.

2. to be evasive.

1945

Baker Aus. Lang. 87: Here are a few more similes snatched from our environment: [...] to wriggle like a cut snake, often used figuratively.

to have sexual intercourse.

[1696		Granville She-Gallants I:1: Sir Toby. That's my little Lord Wagfan—That’s fine Mrs. Wrigglebum].
1832		Satirist (London) 8 Jan. 13/2: The Paris wits are giggling, O! / At the niggling, figgling, wriggling, O! / [...] / While the good old dance is jiggling, O!
1937–84		Partridge DSUE (1984) 1354/2: C.18–19.

to leave.

1909

(ref. to 1860) in J. Ware Passing Eng. of the Victorian Era.