It's basically combining two words: retard and headbang. It's headbanging but looking like a complete moron doing so. It's something that you would make up if you were 11. (Like I did when I was 11...)
That's some straight up tardbanging right there.
by PowF3 March 7, 2010
A tardbanger is any person that does anything stupid. This also includes having sex with anyone who is stupid or does a lot of stupid things. A person that says something incorrect or makes an argument and ends up being wrong. A name to call anyone who makes the smallest mistake.
"Fucking tardbanger," muttered Katie after Ryan hit his thumb with the hammer for the third time that day.
by Katotonic40 November 13, 2021