1. in sexual contexts.
(a) [mid-17C–late 18C; 1960s+] (US campus, also bump off) to have sexual intercourse; thus bumped adj.; bumping n.; bump and grind
(b) [1930s+] (US) to impregnate.
(c) [1980s] (W.I., Baha.) to work as a prostitute.
2. in fig. uses of ‘knock’ (into, over etc).
(a) [late 19C; 2010s] (US) to terminate a relationship (with).
(b) [late 19C+] (Aus./US, also bump someone’s head) to get the better of, to outdo, to deceive.
(c) [late 19C+] to meet, to accost.
(d) [20C+] to dismiss an employee, or someone from a team.
3. in the context of violence.
(a) [1910s+] to kill; to murder.
(b) [1910s+] to shoot dead.
(c) [1910s+] to beat up.
(d) [1940s] to fight successfully, to defeat.
4. to increase.
(a) [1920s+] (also bump up) to increase a prison sentence.
(b) [1940s+] (also bump up) to increase wages or, in gambling use, a bet.
(c) [1940s+] to move someone up or down a queue, appointment calendar etc.
(d) [1960s+] (also bump up) to promote.
(e) [1990s+] to boost one’s intoxication (by taking more drugs).
5. (US campus) to curry favour.
6. [1970s] (US) to dance; thus bumping n., dancing.
7. [1990s+] (US black) to create, to produce.
8. [2000s] of music, a record, to play.
9. (US black) to leave.
10.  (US black) of a cell/mobile telephone, to ring or vibrate.
1. [20C+] to thrust one’s abdomen and gyrate one’s hips; also as n.
2. [20C+] to have sexual intercourse, esp. cursory or spontaneous; also as n.
[20C+] (US) to have sexual intercourse.
see under fuzz n.2
see bump uglies
see sense 1 above.
see under pussy n.
see sense 2b above.
see under titty n.
[1990s+] (US black/teen) to have sexual intercourse.
1. see sense 4a above.
2. see sense 4b above.
3. see sense 4d above.
SE in slang uses
[1990s+] (US) a chance meeting.
[1930s–40s] (US) a pickpocket.
[late 19C–1910s] a police truncheon.
[late 19C+] (Aus.) to meet by accident.
[1900s] (Aus.) to appear, to arrive.
[1990s+] (US black) to drive deliberately into someone’s car with the intention of stopping and then robbing them.
to clash (physically or otherwise), to argue, to debate.
see pump iron under iron n.
see separate entries.
[20C+] (orig. US black) to argue, to talk excessively.
see bump (off) v. (3)
see bump (off) v. (1)
see separate entries.
[1900s] (Aus.) a general phr. of greeting.
[1910s] a phr. of disappointment, complaint.
[1980s] (US campus) an excl. of dismissal.