Top Definition
A pun of parallelism, a backallelism is a witty response or retort, often sexual, that contains parallel structure but a dramatic shift in idea or topic.
Mya: I'm gonna eat dinner, cuz I'm hungry.
JZ: I'm gonna eat you, cuz I'm horny.
Mya: wow.. backallelism
by YellowBoyInBrownTown May 31, 2009
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