Picado is the flamenco technique for playing scales.
Either a style of dancing or simply playing Por Medio on the guitar.
Flamenco strumming - any time you use the back of the nails of your fingers (not the thumb) to play a note.
Flick out each finger as if you are flicking a bug off your knee. We are trying for individual, percussive, and rhythmic strokes with each finger, rather than just unfurling your finger...
Literally a "lift', a subida is a quickening of tempo, which can be gradual or sudden.