The basic major and minor chord shapes, as generally played on an acoustic guitar. They are commonly referred to as the 'Jesus chords' simply because they make up the majority of Christian worship music. Singer/songwriters are also well-known for playing these chords frequently in their music.
A guitarist who is only playing 'Jesus chords' (and not using a capo) will rarely, if ever, move his hand past the 4th fret.
E, F (barre), G, A, C, and D major
E and A minor, B minor (movable), and barre chords that don't include the 3rd finger (movable)
I can kinda play guitar...well, I know the Jesus chords, at least.