An offensive word in the Arabworld, which simplifies to "your mother's vagina". It also has different variations such as "Cos Omac Medaldel" which means "Your mother's Vagina dangles like the sleeve of a wizard". And it can be spelled in different ways such as "kos omak/cos omak/kos omac"
Cos - Vagina
Omac - Your mother
Dave I can't believe you ate my sandwitch, cos omac!
To sleep together in the same bed or similar space. Does not imply having sex. It's what "sleep together" would've meant if we hadn't turned it into a slang idiom meaning "to have sex".
"The kids used to cosominate until we got them separate beds when they were 6 and 8."
"You can crash here if you don't mind cosominating. I don't have a spare mattress."
"We just started having sex last week, but we've been cosominating for months."
when you're holding up your phone and making faces at it, as though you are taking a selfie, but you're really taking a picture of the person across from you or the wall or anything else that seems interesting but you don't want to be caught dead taking a picture of.
This action is often made more convincing by wiggling the eyebrows or opening the mouth, to pretend you're trying to get a Snapchat filter to work.
FRIEND A: "Did you just take a stealthie of me?"
FRIEND B (turning phone around): "no I was just using snapchat's new filter, see?"