TOCSY
From NMR Wiki
TOCSY - Total Correlation SpectroscopY
An experiment where chemical shift of a given nucleus A is correlated with chemical shifts of all nuclei of the same kind that are within the spin system of the atom A. So for example in protein NMR this experiment allow to get correlation between all protons of an amino acid.
HOHAHA (Homonuclear Hartmann Hahn) is a synonym of TOCSY
Here is a list TOCSY experiments.