by David Siddeley December 16, 2016
Get the Sidmug. 
Sudden Infantile Dumbass Syndrome. Occurs when an adult baby is placed in time out and loses a toy and he tries to get it unsuccessfully, and he gets hurt or dies because of it
When Barnaby was placed in time out, he discovered that he had lost his teddy bear. As he reached out of his adult-sized crib to get it, the crib closed on his neck crushing it. He had died suddenly of SIDS. He should have waited for his wife to come back after he had cooled off from his tantrum.
by chad'srockergrrrll October 21, 2010
Get the SIDSmug. Billy (with a lisp): Quinn is such a hot red-headed nugget daddy. I'd love to take his dick..
Bob: Quinn has SIDS. So you're not going to get much of a ride out of that!
Billy: Guess I'll have to suck on his pacifier instead!
Bob: Quinn has SIDS. So you're not going to get much of a ride out of that!
Billy: Guess I'll have to suck on his pacifier instead!
by Skawt September 19, 2018
Get the SIDSmug. Someone who is incompetent and generally gets nothing accomplished. Often used to display a contemptuous attitude towards a person of this nature.
The oft-used: "Goddamnit Sid!"
by joned December 14, 2008
Get the sidmug. 