look up any word, like demisexual:
 
3.
Summer.
Me: We're Gnna hang out over sum sum, yeah?
You: hell yeah.
by Haley Hazardous April 26, 2009
 
1.
A little something.

Sometimes a little something extra.

Used many different ways to imply a variety of things including drugs, sex or sexual acts, money, etc.

Can be used to describe almost anything you want a little something of.
I called my dealer up for a lil sum-sum to take to the party.

She was so wasted that she drunk dialed her ex last night for a lil sum-sum.

I told him to throw a little extra sum-sum into the sack I bought since I am such a faithful customer.
by Sarah Lambert March 05, 2008
 
2.
having sex..like getting sum from somebody
dude: wat did you do last night with that girl
dude1: dude i got sum sum last night
by walkersss May 19, 2009
 
4.
Usually pronounced when mumbling. The description of weed when talking about it in public. can also be said while making a "2-puffs on the joint" gesture
Example 1:

The Boy: Yo dog, whats good?
The Man: Nothin. What you doin?
The Boy: Not shit.
The Man: You wanna go behind tha dumpster n smoka lil bitter dat sum sum?

Example 2:
Tina: Do you smell skunk?"
Ed: Skunk? You talkin as in the animal? Or you talkin bout you smell sum sum?
by Morbyd West July 07, 2010
 
5.
a underground word for a girl's period.

Girl1: Are you okay? You seem pissy.
Girl2: i'm on my sum sum
Girl1: ohhhhhhhhh
by xXFuckPrettyXx August 03, 2008