Green’s Dictionary of Slang

wild adj.

1. [1920s+] (US) exciting, wonderful.

2. [1910s-40s] (US) enthusiastic.

3. [1940s+] eccentric, bizarre, weird, odd; also as adv.

4. [1960s+] (US Und.) consecutive, referring to prison sentences; also as adv.

5. [1990s+] (W.I.) philandering.

In compounds

wild-ass (adj.) (also wild-assed) [sense 3 + -ass sfx]

[1910s+] (US) crazy, insane, unbalanced.

SE in slang uses

In compounds

wild-buck (adj.)

[1950s] uncontrolled, unrestrained.

wild card (n.) [poker imagery]

[20C+] (US) something or someone unknown or unpredictable.

wildcat/catter

see separate entries.

wildfire (n.) [its taste and effects]

[mid-18C] a fiery drink.

wild hair (n.)

[1930s+] (US) a theory, poss. extravagant; thus wild-haired adj.

wild oats (n.) [SE sow one’s wild oats]

[mid-16C–early 17C] a dissolute young man, a rake.

wild rogue (n.) [ext. of rogue n. (1)]

[16C–early 19C] (UK Und.) a dedicated professional villain.

wild thing, the (n.)

see separate entry.

wild Willy (n.)

[late 19C] (US campus) a dedicated hedonist.

In phrases