Top definition
A modification done to a street car that pushes it so hard it blows the push rods and pistons to the moon.
Old-Man: Is that your idiot son running around with that loud diesel pickup?
Dad: Yeah he took it to the shop and got it moontuned last week.
Dad: Yeah he took it to the shop and got it moontuned last week.
by Hollogyny August 19, 2021