What is Cosominate?
1.
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."
See