Green’s Dictionary of Slang

bop v.

also boop
[Kentish dial. bop, to throw anything down with a resounding noise; ult. onomat.]

1. [1910s+] (orig. US) to hit.

2. [1930s+] (orig. US) to kill.

3. [1950s+] (orig. US, also bap) to walk, esp. in a carefree, bouncy way.

4. [1950s+] (US) to fight (with a weapon); thus bopping n., fighting.

5. [1950s+] (orig. US) to dance; thus bopping n., dancing.

6. [1970s+] (US) to have sexual intercourse.

7. [1980s] (orig. US) to ride, i.e. a bicycle or car.

8. [1990s+] (orig. US) to look for someone to seduce.

In phrases

bop around (v.)

[1960s+] to keep moving, to wander about rather than stay put; to visit briefly.

bop it up (v.)

[1950s] (US teen) to enjoy oneself, to go out on a spree.

bop out (v.) [sense 1; the image is of being knocked over]

[20C+] (US) to faint.

bop up (v.) [fig. use of sense 1, cognate with knock up v. (5), i.e. to make]

[1970s–80s] (N.Z. prison) to improve the tailoring of prison-issue clothing; thus bopped-up, enhanced.