Refers to someone else whom you feed junk foods to instead of eating them yourself while you're trying to lose weight; said "designated ballooner" therefore develops a disgusting bulgy flabby stomach himself, while your own "spare tire" goes from a P304/65/R17 down to around a P150/30/R17.
A classic demonstration of a "surrogut" can be seen in da famous 1935 Laurel & Hardy comedy "Thicker Than Water", in which so much of The Boys' blood gets swapped back and forth between them during a botched transfusion dat Ollie ends up much slimmer while Stan gains fifty pounds or more.
by QuacksO January 19, 2023