backspace and overstrike: interj. Whoa! Back up. Used to suggest that someone just said or did something wrong.

:backspace and overstrike: interj. Whoa! Back up. Used to suggest
that someone just said or did something wrong. Common among
APL programmers.
-- The AI Hackers Dictionary

Related:

• backspace and overstrike interj. [rare] Whoa! Back up.
  Used to suggest that someone just said or did something...
• spin: vi. Equivalent to {buzz}. More common among C and UNIX programmers.
  The AI Hackers...
• line starve: [MIT] 1. vi. To feed paper through a printer the wrong way by one line (most printers can't do this).
  On a display terminal, to move the cursor up to...
• berklix: /berk'liks/ n.,adj. [contraction of `Berkeley UNIX'] See {BSD}.
  Not used at Berkeley itself. May be more common among...
• control-C: vi. 1. "Stop whatever you are doing." From the interrupt character used on many operating systems to abort a running program.
  Considered silly. 2. interj. Among BSD UNIX hackers...
• loop through: vt. To process each element of a list of things.
  "Hold on, I've got to loop through my paper mail."...
• rape: vt. 1. To {screw} someone or something, violently;
  in particular, to destroy a program or information...
• feetch feetch: /feech feech/ interj. If someone tells you about some new improvement to a program,
  you might respond: "Feetch, feetch!" The meaning...
• stale pointer bug: n. Synonym for {aliasing bug} used esp.
  among microcomputer hackers. -- The AI Hackers...