sum sum

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 September 28, 2008

sum

'really' or 'very'

'thats sum cool!' or 'hes sum hot!'

by i have no life May 15, 2005

Sums

The ratio of seats to bums on public transport, particularly relevant to rail travel.

Southeastern never seem to get their sums right!

by EmptyPots March 28, 2015

*SUMS*

Acronym for "Super Ultra Mega Slap"

Used when insulting or scolding someone for what one thinks is tasteless, immoral, or just fucking retarded.

May also be followed by an actual slap.

Coined in 2004, by a kid with an itchy fro and another kid who was just trying to fit in.

Me - Hey Colton, I just went out and bought the new Nightmare Creatures game!

Colton - *SUMS*

by superskiier August 2, 2008

sum sum ig

an instagram account made by a boy where he posts pictures of himself pretending to be a woman

look at him, he's posting for sum sum ig again!

by averyone's mr tang April 12, 2021

sum

A guy with a huge mule who likes to talk dirty to women.

Look at Sum, he's a stud.

by Sum's Lover November 12, 2003

sum

A game where when someone says something stupid and you get to hit them on the head for it. After someone says the stupid statement, you immediately say "That's sum." while rubbing your fingers in the air like the sign for paying money.

Mick, "I drank 7 out of the last 5 days"
Al & Calvin, "That's sum, asshole (rubbing fingers in the air)."
then Al & Calvin each get to slap mick on the top of the head.

by a. ryan May 27, 2006