Ab 7sus2, 3rd inversion (F# in the bass)
Also written as Ab7sus2/F#.
Notes, from the bass up
F# (bass)G#A#D#
The same notes as Ab 7sus2 (F#, G#, A# and D#), rearranged so F# is the lowest note. Use it to move between chords with smaller jumps across the keyboard.