WordNet (r) 3.0 (2006):

trampoline
    n 1: gymnastic apparatus consisting of a strong canvas sheet
         attached with springs to a metal frame; used for tumbling

The Free On-line Dictionary of Computing (19 January 2023):

trampoline

   An incredibly hairy technique, found in some HLL and
   program-overlay implementations (e.g. on the Macintosh), that
   involves on-the-fly generation of small executable (and,
   likely as not, self-modifying) code objects to do indirection
   between code sections.  These pieces of live data are called
   "trampolines".  Trampolines are notoriously difficult to
   understand in action; in fact, it is said by those who use
   this term that the trampoline that doesn't bend your brain is
   not the true trampoline.  See also snap.

   [Jargon File]

   (2003-03-26)


The Jargon File (version 4.4.7, 29 Dec 2003):

trampoline
 n.

    An incredibly hairy technique, found in some HLL and program-overlay
    implementations (e.g., on the Macintosh), that involves on-the-fly
    generation of small executable (and, likely as not, self-modifying) code
    objects to do indirection between code sections. Under BSD and possibly in
    other Unixes, trampoline code is used to transfer control from the kernel
    back to user mode when a signal (which has had a handler installed) is sent
    to a process. These pieces of live data are called trampolines.
    Trampolines are notoriously difficult to understand in action; in fact, it
    is said by those who use this term that the trampoline that doesn't bend
    your brain is not the true trampoline. See also snap.