45 miles per hour-er 

Someone who drives at a constant 45 miles per hour, regardless of what the speed limit is on their section of road. They'll happily speed dangerously through a residential area where the limit is 30, and then hold everyone up on a main road where the limit is 60.

"Hey dude, is this guys speedo broken?"

"Nah, he is a 45 miles per hour-er"

"O ryt. What a noob"

45 miles per hour-er by FatSharkSlim June 27, 2009

88 miles per hour 

1) the speed at which a flux capacitor kicks your time-traveling ass through time
2) something that allows you to see some serious shit

James- "Dude, I just crammed 23 M-80s into that mailbox!"
KAPLOOEY!!!
Maurice- "Man, that was freakin 88 miles per hour!"
James- "...What?"

88 miles per hour by Suburban_Informant April 28, 2006

420 Miles Per Hour 

When you're blazed as fuck and you only do things at your own speed.

"sorry i'm late bro, i had a joint before I left, now i'm going at 420 miles per hour"

420 Miles Per Hour by isitallovermyface March 3, 2017

88 miles per hour! 

An exclamation expressing joy that something complex that you created or did actually works.

88 miles per hour! by Anonymous August 8, 2003