What term is used to describe a spread spectrum communications system in which a very fast binary bit stream is used to shift the phase of an RF carrier?

Direct Sequence Spread Spectrum (DSSS) involves multiplying the original data with a very fast, high-rate pseudo-random binary bit stream known as a chipping code. This fast bit stream rapidly shifts the phase of the RF carrier, effectively spreading the signal's energy over a much wider bandwidth than the original narrow-band data required. While Binary Phase-Shift Keying (BPSK) is the underlying modulation technique used to shift the phase, 'Direct sequence' is the specific term for the spread spectrum system described in the question. Frequency hopping, on the other hand, changes the carrier frequency rather than using a fast bit stream to shift phase.