1. Originating from Ethnic Descent's album "Simply Kept," fat love is deep, tender, ineffable feeling of affection and solicitude toward a person, such as that arising from kinship, partnership, or a sense of underlying oneness, resulting in fulfillment of enormous proportions.
2. An expression of one's affection to the largest extent, not necessarily making one physically fat with love (although this may be the case for some), but emotionally and spiritually fat with love.
3. June and Rodney.
"You make me fat, so me give you fat love back..."
marjorie, the fat fighters woman from little britain, used this term to describe to the group what it was called when two really fat people had sex.
"...this is what we call 'fat love'"