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?"
by Suburban_Informant April 14, 2006
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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"
by isitallovermyface March 3, 2017
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An exclamation expressing joy that something complex that you created or did actually works.
by Anonymous August 9, 2003
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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"
by FatSharkSlim June 27, 2009
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