by Marc's Always Right June 27, 2016
 Get the bruh-sismug.
Get the bruh-sismug. Some retarded bullshit "phrase" used by the idiots that populate the Random Nonsense forum on the Day of Defeat official website. It makes absolutely no sense and is beyond retarded. Using 'si' instead of 'is', is no longer funny. It became unfunny after JeffK's popularity died out 3 years ago. Please stop emulating him. It's really, really dumb. Thanks.
by KYX! February 6, 2003
 Get the SI TARPmug.
Get the SI TARPmug. your fatass sister that always wants to incest fuck and get your cum inside of her because she knows she will never have sex
by Fortniteporn.com December 10, 2019
 Get the Chubby sismug.
Get the Chubby sismug. by banterflan April 22, 2011
 Get the Sulky Simug.
Get the Sulky Simug. The personification of awesomeness.
by BadGui June 20, 2007
 Get the Si BadGuimug.
Get the Si BadGuimug. by thequeen10 April 1, 2010
 Get the sis seshmug.
Get the sis seshmug. 