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n. 1. Tilde (ASCII 1111110, '~'). Also called 'squiggle', 'sqiggle' (sic -- pronounced /skig'l/), and 'twaddle', but twiddle is the most common term.

2. A small and insignificant change to a program. Usually fixes one bug and generates several new ones.

3. vt. To change something in a small way. Bits, for example, are often twiddled. Twiddling a switch or knob implies much less sense of purpose than toggling or tweaking it; see {frobnicate}. To speak of twiddling a bit connotes aimlessness, and at best doesn't specify what you're doing to the bit; 'toggling a bit' has a more specific meaning (see bit twiddling, toggle).