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A fart that makes a deep booming noise like a subwoofer.
The following is an example of ass bass:
Person 1: "Damn the subwoofer on this sound system is amazing."
Person 2: Nah, actually that was me. I just farted.
by assofbass September 10, 2007
insult; to make offense; someone who has genitals that are so big that no one wants them and they have to have anal sex with tehmself.
nick: omg this feels great to bad nobod can enjoy it with me.
steck: u are an ass bass!
by samuel adams February 10, 2005