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a) someone's sidekick

b) an offensive term for someone's mistress or lover
If you want an on-the-side definition b), don't be in a classical ltr; look for an open relationship instead.
by sexydimma June 03, 2015
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Aug 5 Word of the Day
When your so pissed off from losing multiple amount of games that you play worse and worse till your so pissed you begin leaning over your keyboard screaming over every little mistake you make and complaining about gaming imbalances

(Common in Starcraft II)
"Why is johnny screaming at his computer"

"He lost a few games of Starcraft II, I think he is Tilting"
by Lashley1337 February 14, 2012
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Having an extra sex partner. Having sex with a friend as in friend with benefits while in a relationship with someone else.
I like fucking him on the side, just like I like ordering my salad dressing on the side.
by Frisco Stories August 12, 2008
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Having a sexual relationship with a person outside of one's primary, emotional relationship.

See, mistress.
"Hey man, I heard you were getting a little action on the side! Did you nail her?"
by Nathan V. August 07, 2008
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weekend, the days on the sides of a calendar i.e. Saturday and Sunday.
Person 1: Hey what're you doing on the side?
Person 2: I'm going to Lake Taho with Matta dn Jess.
by Nikkola March 06, 2005
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a) humorous, someone's sidekick

b) (very offensive): someone's mistress or lover.
I'd rather have an on-the-side definition a) than an on-the-side definition b)
by sexydimma December 08, 2014
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