by margeriejones October 25, 2011

Moron: "Whoa! It sucks to chum on the weather side! Now I'm covered in my own puke!"
Non-Moron: "No shit!"
Non-Moron: "No shit!"
by KodiakMamaBear March 18, 2005

When a fat nasty person eats food and gets shit all over their face, but they don't notice it and they just keep eating their food while you can't help but stare and vomit.
While Rachel was eating her sub a little mayonnaise dribbled down her face, but she didn't notice. Sean could only sit and stare in disgust and complete nausea as she kept chumming on her sub.
by CB.88 November 10, 2008

To have an exited conversation with friends, or chums, in which one or all involed are most enthused by the topic.
"Oh dear. He is/they are chumming again."
by 'Jamin May 19, 2005

To be overly friendly towards members of the opposite sex, normally in an attempt to pull, and with any luck, play hide the sausage with them
"where's Jason?"
"Oh don't worry, he's just chumming the barmaid again"
"pfft, better get another pint in then"
"Oh don't worry, he's just chumming the barmaid again"
"pfft, better get another pint in then"
by newbloke August 22, 2005

Chum Chum is extra fat/flab that is on you're forehead. This can also be related to fat layers on the foreskin.
by Tado October 12, 2009

Act(s) that lead(s) up to and includes sexual intercourse (i.e. making out, hugging in "that way", etc.)
by Mars November 09, 2003
