by Grey Dawg November 05, 2009

An acronym for "suck it up"
by Lynbrook Viking April 04, 2006

When that boatload of coal claimed whiplash, they called SIU in to videotape them playing basketball
by Teabag April 24, 2006

Acronym for 'step it up' meaning for one to reach a new/higher level then previously on.
Commonly used in forums and online gaming.
Commonly used in forums and online gaming.
by Charlag November 14, 2011

A word the world of football/soccer use all the time. It is known by a player called Cristiano Ronaldo that makes that sound whilst doing his celebration after scoring a goal.
by Definition Merchant January 23, 2022

by Siu to the dude February 27, 2022

by Brown dog December 12, 2021
