1. [1960s+] to have adventurous sex; to have anal intercourse.
2. [1980s+] (US campus, also freak all over, freak on) to dance in a highly sexual manner, to simulate sex on the dance-floor.
3. [1990s+] to have sexual intercourse.
4. [2000s] to excite (sexually).
5. [2000s] (US drugs) to disguise a marijuana cigarette by wrapping it in a ‘legitimate’ cigar wrapper.
to act in an unrestrained manner.
[1970s] (US gay) to behave extravagantly, whether sexually or socially.