when you have to take care of your belligerently drunk friend; and keep him or her from harm thus scewing up your night.
Man I would have hooked up with that girl but I ended up having to be a buddy sitter to john.
by sidmon69 March 16, 2013
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Someone who volunteers to keep an eye on someone who is intoxicated. They are always sober, or at least have control over themselves and are able to "sit" (babysit) the intoxicated person to prevent them from accidentally harming themselves (from falling and such). They should be someone trustworthy. This practice is recommended for strong mind-altering psychedelic drugs, such as Salvia, Phencycladine, Jimson Weed, and Ketamine.

Synonym: SS, SS Guard
Hey will you be my sober sitter? I really wanna try salvia.
Sure man, whatever.
by N8Duff July 06, 2008
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Someone who has their head so far up their ass they are sitting on their own shoulders.
My boss is such a shoulder sitter, I wonder how he can see his computer screen with his big fat head lodged in is anus.
by Saltine Nachos February 20, 2009
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The backside of any person, individual. The butt cheecks, the rear end, the caboose, the ass.
Person One: Look at the large toilet sitter on that bitch.

If the 'toilet sitter' of the person is some hot babe, then, "Awww, yeah, she could sit on me any day of the week."

If the 'toilet sitter' is from a larger heavyset woman, then, "(SPIT TAKE) HOLY SHIT, WHAT? (VOMIT.)

(Not just for females, but males as well.)
by zinnate November 12, 2011
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Pretty self explanatory... one who sits on pickles. Usually practiced by homosexuals who enjoy the sensation of pickles penetrating their asshole.
Hey Joe, don't be alone in a room with Randy... he's a known pickle sitter.
by TummyStix January 16, 2008
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