Top definition
The act of someone, in most cases female, seeking to see if a man is lying or already in a relationship by asking several questions of the CSI-ee and friends, looking around the apartment/house and/or online for clues like a Crime Scene Investigator.
Leah noticed a bra in a man's bathroom, dishware for two, and a photo collage of a girl in the guy's place where she has visited for the first time.

"The second she entered the house, she began CSI'ing the place."
by BluePumpkin May 20, 2009
Get a CSI'ing mug for your bunkmate Callisto.
Sep 14 Word of the Day
Micro marriging is when your partner manages your personal day-to-day tasks with you much like a Micro Manager at work.
Wife: “Have you put the sheets out to dry and put the towels on?”
Husband: “Yes. You know I am a grown adult also used to live alone so you do not need to micro marrige me”
by Thomas Maddocks March 16, 2018
Get a micro marrige mug for your cousin Julia.
2
When you really wanna blaze, but you have to do it outside, after a snowfall. The snow shows where you go, where you blaze (ash, roaches, etc.) and then heading home. Making easy evidence for a cop.
It's so sketch to go CSI-ing, cops could bust us so easily!
by randomkyle December 19, 2008
Get the CSI-ing neck gaiter and mug.
3
after watching too many episodes of C.S.I., you start thinking that you are a "CSI" when things go weird thus you investigate or start "CSI'ING" what you don't now or understand.
man, my lighter is missing, I know one of y'all took it, 'm gonna be CSI'ING the shit outa this place till I find it yo!
by kagic February 06, 2016
Get a CSI'ing mug for your fish Manafort.